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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:33:50 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:33:50 +0000 |
| commit | fe39ffb8b90ae4e002ed73fe98617cd590abb467 (patch) | |
| tree | b80e5956907d8aeaaffe4e4f0c068c0e6157ce8b /docs/manual/mod/mod_md.html.en | |
| parent | Initial commit. (diff) | |
| download | apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.tar.xz apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.zip | |
Adding upstream version 2.4.56.upstream/2.4.56
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'docs/manual/mod/mod_md.html.en')
| -rw-r--r-- | docs/manual/mod/mod_md.html.en | 1484 |
1 files changed, 1484 insertions, 0 deletions
diff --git a/docs/manual/mod/mod_md.html.en b/docs/manual/mod/mod_md.html.en new file mode 100644 index 0000000..95c5e1b --- /dev/null +++ b/docs/manual/mod/mod_md.html.en @@ -0,0 +1,1484 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> +<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> +<!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --> +<title>mod_md - Apache HTTP Server Version 2.4</title> +<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> +<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> +<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.min.js" type="text/javascript"> +</script> + +<link href="../images/favicon.ico" rel="shortcut icon" /></head> +<body> +<div id="page-header"> +<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> +<p class="apache">Apache HTTP Server Version 2.4</p> +<img alt="" src="../images/feather.png" /></div> +<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div> +<div id="path"> +<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div> +<div id="page-content"> +<div id="preamble"><h1>Apache Module mod_md</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_md.html" title="English"> en </a> | +<a href="../fr/mod/mod_md.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div> +<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Managing domains across virtual hosts, certificate provisioning + via the ACME protocol + </td></tr> +<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>md_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_md.c</td></tr> +<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.30 and later</td></tr></table> +<h3>Summary</h3> + + <p> + This module manages common properties of domains for one or more virtual hosts. + Its serves two main purposes: for one, supervise/renew TLS certificates via the + ACME protocol (<a href="https://tools.ietf.org/html/rfc8555">RFC 8555</a>). + Certificates will be renewed by the module ahead of their expiration to account + for disruption in internet services. There are ways to monitor the status of all + certififcates managed this way and configurations that will run your own + notification commands on renewal, expiration and errors. + </p><p> + Second, mod_md offers an alternate OCSP Stapling implementation. This works with + managed certificates as well as with certificates you configure yourself. OCSP + Stapling is a necessary component for any https: site, influencing page load + times and, depending on other setups, page availability. More in the + stapling section below. + </p><p> + The default ACME Authority for managing certificates is + <a href="https://letsencrypt.org/">Let's Encrypt</a>, but it is possible + to configure another CA that supports the protocol. + </p> + + <p>Simple configuration example:</p> + + <div class="note"><h3>TLS in a VirtualHost context</h3> + <pre class="prettyprint lang-config">MDomain example.org + +<VirtualHost *:443> + ServerName example.org + DocumentRoot htdocs/a + + SSLEngine on + # no certificates specification +</VirtualHost></pre> + + <p> + This setup will, on server start, contact + <a href="https://letsencrypt.org/">Let's Encrypt</a> + to request a certificate for the domain. If Let's Encrypt can verify the ownership + of the domain, the module will retrieve the certificate and its chain, store it + in the local file system (see <code class="directive"><a href="#mdstoredir">MDStoreDir</a></code>) + and provide it, on next restart, to <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code>. + </p><p> + This happens while the server is already running. All other hosts will continue + to work as before. While a certificate is not available, requests for the managed + domain will be answered with a '503 Service Unavailable'. + </p> + </div> + + <div class="note"><h3>Prerequisites</h3> + <p> + This module requires <code class="module"><a href="../mod/mod_watchdog.html">mod_watchdog</a></code> to be loaded as well. + </p><p> + Certificate sign-up and renewal with Let's Encrypt requires your server to be + reachable on port 80 (http:) and/or port 443 (https:) from the public internet. + (Unless your server is configured to use DNS for challenges - more on that under + 'wildcard certificates') + </p><p> + The module will select from the methods offered by Let's Encrypt. Usually LE offers + challenges on both ports and DNS and Apache chooses a method available. + </p><p> + To determine which one is available, the module looks at the ports + Apache httpd listens on. If those include port 80, it assumes that the + http: challenge (named http-01) is available. If the server listens + on port 443, the https: challenge (named tls-alpn-01) is also added to + the list. (And if <code class="directive"><a href="#mdchallengedns01">MDChallengeDns01</a></code> + is configured, the challenge dns-01 is added as well.) + </p><p> + If your setup is not so straight forward, there are two methods available + to influence this. First, look at <code class="directive"><a href="#mdportmap">MDPortMap</a></code> + if the server is behind a portmapper, such as a firewall. Second, you may + override the module's guesswork completely by configuring + <code class="directive"><a href="#mdcachallenges">MDCAChallenges</a></code> directly. + </p> + </div> + + <div class="note"><h3>https: Challenges</h3> + <p> + For domain verification via the TLS protocol `tls-alpn-01` is the name + of the challenge type. It requires the Apache server to listen on port 443 + (see <code class="directive"><a href="#mdportmap">MDPortMap</a></code> if you map that port + to something else). + </p><p> + Let's Encrypt will open a TLS connection to Apache using the special indicator + `acme-tls/1` (this indication part of TLS is called ALPN, therefore the name + of the challenge. ALPN is also used by browsers to request a HTTP/2 connection). + </p><p> + As with the HTTP/2 protocol, to allow this, you configure: + </p> + <pre class="prettyprint lang-config">Protocols h2 http/1.1 acme-tls/1</pre> + + <p> + And the `tls-alpn-01` challenge type is available. + </p> + </div> + + <div class="note"><h3>Wildcard Certificates</h3> + <p> + Wildcard certificates are possible, but not straight-forward to use out of + the box. Let's Encrypt requires the `dns-01` challenge verification + for those. No other is considered good enough. + </p><p> + The difficulty here is that Apache cannot do that on its own. As the name implies, `dns-01` + requires you to show some specific DNS records for your domain that contain + some challenge data. So you need to _write_ your domain's DNS records. + </p><p> + If you know how to do that, you can integrated this with mod_md. Let's + say you have a script for that in `/usr/bin/acme-setup-dns` you configure + Apache with: + </p> + <pre class="prettyprint lang-config">MDChallengeDns01 /usr/bin/acme-setup-dns</pre> + + <p> + and Apache will call this script when it needs to setup/teardown a DNS challenge + record for a domain. + </p><p> + Assuming you want a certificate for `*.mydomain.com`, mod_md will call: + </p> + <pre class="prettyprint lang-config">/usr/bin/acme-setup-dns setup mydomain.com challenge-data +# this needs to remove all existing DNS TXT records for +# _acme-challenge.mydomain.com and create a new one with +# content "challenge-data"</pre> + + <p> + and afterwards it will call + </p> + <pre class="prettyprint lang-config">/usr/bin/acme-setup-dns teardown mydomain.com +# this needs to remove all existing DNS TXT records for +# _acme-challenge.mydomain.com</pre> + + </div> + + <div class="note"><h3>Monitoring</h3> + <p> + Apache has a standard module for monitoring: <code class="module"><a href="../mod/mod_status.html">mod_status</a></code>. + mod_md contributes a section and makes monitoring your + domains easy. + </p><p> + You see all your MDs listed alphabetically, the domain names they contain, + an overall status, expiration times and specific settings. The settings + show your selection of renewal times (or the default), the CA that is used, + etc. + </p><p> + The 'Renewal' column will show activity and error descriptions for certificate + renewals. This should make life easier for people to find out if everything + is all right or what went wrong. + </p><p> + If there is an error with an MD it will be shown here as well. This let's + you assess problems without digging through your server logs. + </p><p> + There is also a new 'md-status' handler available to give you the MD information + from 'server-status' in JSON format. You configure it as + </p> + <pre class="prettyprint lang-config"><Location "/md-status"> + SetHandler md-status +</Location></pre> + + <p> + on your server. As with 'server-status' you will want to add + authorization for this. + </p><p> + If you just want to check the JSON status of a specific domain, simply append + that to your status url: + </p> + <pre class="prettyprint lang-config">> curl https://<yourhost>/md-status/another-domain.org +{ + "name": "another-domain.org", + "domains": [ + "another-domain.org", + "www.another-domain.org" + ], + ...</pre> + + <p> + This JSON status also shows a log of activities when domains are renewed: + </p> + <pre class="prettyprint lang-config">{ +"when": "Wed, 19 Jun 2019 14:45:58 GMT", +"type": "progress", "detail": "The certificate for the managed domain has been renewed successfully and can be used. A graceful server restart now is recommended." +},{ +"when": "Wed, 19 Jun 2019 14:45:58 GMT", +"type": "progress", "detail": "Retrieving certificate chain for test-901-003-1560955549.org" +},{ +"when": "Wed, 19 Jun 2019 14:45:58 GMT", +"type": "progress", "detail": "Waiting for finalized order to become valid" +},{ +"when": "Wed, 19 Jun 2019 14:45:50 GMT", +"type": "progress", "detail": "Submitting CSR to CA for test-901-003-1560955549.org" +}, +...</pre> + + <p> + You will also find this information in the file `job.json` in your staging and, + when activated, domains directory. This allows you to inspect these at + any later point in time as well. + </p><p> + In addition, there is <code class="directive"><a href="#mdcertificatestatus">MDCertificateStatus</a></code> which + gives access to relevant certificate information in JSON format. + </p> + </div> + + <div class="note"><h3>Stapling</h3> + <p> + If you want to try the stapling in one Managed Domain alone at first, + configure: + </p> + <pre class="prettyprint lang-config"><MDomain mydomain.net> + MDStapling on +</MDomain></pre> + + <p> + and use the 'server-status' and/or <code class="directive"><a href="#mdmessagecmd">MDMessageCmd</a></code> to see how it operates. You will + see if Stapling information is there, how long it is valid, from where it came and + when it will be refreshed. + </p><p> + If this all works to your satisfaction, you can switch it on for all your + certificates or just your managed ones. + </p><p> + The existing stapling implementation by mod_ssl is used by many sites + for years. There are two main differences between the mod_ssl and mod_md + one: + </p> + <ol> + <li>On demand vs. scheduled: mod_ssl retrieves the stapling information + when it is requested, e.g. on a new connection. mod_md retrieves it + right at server start and after 2/3rds of its lifetime.</li> + <li>In memory vs. persisted: mod_ssl <em>can</em> persist this + information, but most example configurations use a memory cache. mod_md + always stores in the file system.</li> + </ol> + <p> + If you are unlucky and restart your server during an outage of your CA's + OCSP service, your users may no longer reach your sites. Without persistence + your server cannot provide the client with the data and the client browser + cannot get it as well, since the OCSP service is not responding. + </p><p> + The implementation in mod_md will have persisted it, load it again after + restart and have it available for incoming connections. A day or two before + this information expires, it will renew it, making it able to cope with + a long OCSP service downtime. + </p><p> + Due to backward compatibility, the existing implementation in mod_ssl could + not be changed drastically. For example, mod_ssl is unable to add a dependency + to mod_watchdog without braking many existing installations (that do not load it). + </p> + </div> + + <div class="note"><h3>tailscale</h3> + <p> + Since version 2.4.14 of the module, you can use it to get certificates + for your <a href="https://tailscale.com">tailscale</a> domains. + </p> + <pre class="prettyprint lang-config"><MDomain mydomain.some-thing.ts.net> + MDCertificateProtocol tailscale + MDCertificateAuthority file://localhost/var/run/tailscale/tailscaled.sock", +</MDomain></pre> + + <p> + Tailscale provides secure networking between your machines, where ever + they are, and can provide domain names in the *.ts.net space for them. + For those, it will then provide Let's Encrypt certificates as well, so + you can open these domains in your browser securely. + </p> + <p> + The directives listed above tell Apache to contact the local tailscale + demon for obtaining and renewing certificates. This will only work for + the domain name that tailscale assigns to your machine. + </p> + <p> + Otherwise, these certificates work exactly like the ones retrieved + via the ACME protocol from Lets Encrypt. You see them in status reporting + and MDMessageCmd directives are executed for them as well. + </p> + <p> + More details are <a href="https://github.com/icing/mod_md#tailscale"> + available at the mod_md github documentation</a>. + </p> + <p> + Note that this feature only works on machines where the tailscale + demon provides a unix domain socket. This, so far, seems only the + case on *nix systems. + </p> + </div> + + </div> +<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3 class="directives">Directives</h3> +<ul id="toc"> +<li><img alt="" src="../images/down.gif" /> <a href="#mdactivationdelay">MDActivationDelay</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdbaseserver">MDBaseServer</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdcachallenges">MDCAChallenges</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdcertificateagreement">MDCertificateAgreement</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdcertificateauthority">MDCertificateAuthority</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdcertificatecheck">MDCertificateCheck</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdcertificatefile">MDCertificateFile</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdcertificatekeyfile">MDCertificateKeyFile</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdcertificatemonitor">MDCertificateMonitor</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdcertificateprotocol">MDCertificateProtocol</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdcertificatestatus">MDCertificateStatus</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdchallengedns01">MDChallengeDns01</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdcontactemail">MDContactEmail</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mddrivemode">MDDriveMode</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdexternalaccountbinding">MDExternalAccountBinding</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdhttpproxy">MDHttpProxy</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdmember">MDMember</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdmembers">MDMembers</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdmessagecmd">MDMessageCmd</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdmuststaple">MDMustStaple</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdnotifycmd">MDNotifyCmd</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdomain">MDomain</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdomainsetsection"><MDomainSet></a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdportmap">MDPortMap</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdprivatekeys">MDPrivateKeys</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdrenewmode">MDRenewMode</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdrenewwindow">MDRenewWindow</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdrequirehttps">MDRequireHttps</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdretrydelay">MDRetryDelay</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdretryfailover">MDRetryFailover</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdserverstatus">MDServerStatus</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdstapleothers">MDStapleOthers</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdstapling">MDStapling</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdstaplingkeepresponse">MDStaplingKeepResponse</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdstaplingrenewwindow">MDStaplingRenewWindow</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdstoredir">MDStoreDir</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdstorelocks">MDStoreLocks</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#mdwarnwindow">MDWarnWindow</a></li> +</ul> +<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_md">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_md">Report a bug</a></li></ul><h3>See also</h3> +<ul class="seealso"> +<li><a href="#comments_section">Comments</a></li></ul></div> + +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDActivationDelay" id="MDActivationDelay">MDActivationDelay</a> <a name="mdactivationdelay" id="mdactivationdelay">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td /></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDActivationDelay <var>duration</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.42 and later</td></tr> +</table> + <p> + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDBaseServer" id="MDBaseServer">MDBaseServer</a> <a name="mdbaseserver" id="mdbaseserver">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Control if base server may be managed or only virtual hosts.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDBaseServer on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDBaseServer off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + Controls if the base server, the one outside all VirtualHosts should be managed by + mod_md or not. By default, it will not. For the very reason that + it may have confusing side-effects. It is recommended that you have virtual hosts + for all managed domains and do not rely on the global, fallback server configuration. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDCAChallenges" id="MDCAChallenges">MDCAChallenges</a> <a name="mdcachallenges" id="mdcachallenges">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Type of ACME challenge used to prove domain ownership.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDCAChallenges <var>name</var> [ <var>name</var> ... ]</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDCAChallenges tls-alpn-01 http-01 dns-01</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + Sets challenge types (in order of preference) when proving domain ownership. + Supported by the module are the challenge methods 'tls-alpn-01', 'dns-01' + and 'http-01'. The module will look at the overall configuration of the server + to find out which methods can be used. + </p><p> + If the server listens on port 80, for example, the 'http-01' method is available. + The prerequisite for 'dns-01' is a configured <code class="directive"><a href="#mdchallengedns01">MDChallengeDns01</a></code> command. + 'tls-alpn-01' is described above in 'https: Challenges'. + </p><p> + This auto selection works for most setups. But since Apache is a very powerful + server with many configuration options, the situation is not clear for all + possible cases. For example: it may listen on multiple IP addresses where some + are reachable on `https:` and some not. + </p><p> + If you configure <code class="directive">MDCAChallenges</code> directly, this auto selection is disabled. + Instead, the module will use the configured challenge list when talking to + the ACME server (a challenge type must be offered by the server as well). + This challenges are examined in the order specified. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDCertificateAgreement" id="MDCertificateAgreement">MDCertificateAgreement</a> <a name="mdcertificateagreement" id="mdcertificateagreement">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>You confirm that you accepted the Terms of Service of the Certificate + Authority.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDCertificateAgreement accepted</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p>When you use mod_md to obtain a certificate, you become a customer of the CA (e.g. Let's Encrypt). That means you need to read and agree to their Terms of Service, + so that you understand what they offer and what they might exclude or require from you. + mod_md cannot, by itself, agree to such a thing. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDCertificateAuthority" id="MDCertificateAuthority">MDCertificateAuthority</a> <a name="mdcertificateauthority" id="mdcertificateauthority">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The URL(s) of the ACME Certificate Authority to use.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDCertificateAuthority <var>url</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDCertificateAuthority letsencrypt</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + The URL(s) where the CA offers its service. + Instead of the actual URL, you may use 'letsencrypt' or 'buypass'. + </p><p> + If you configure more than one URL, each one is tried in a round-robin + fashion after a number of failures. You can configure how quickly or + delayed that happens via the <code class="directive">MDRetryDelay</code> and + <code class="directive">MDRetryFailover</code> directives. The default setting + makes a failover after about half a day of trying. + </p><p> + All other settings apply to each of these URLs. It is therefore + not possible to have two with different + <code class="directive">MDExternalAccountBinding</code>s, for example. + </p><p> + For testing, CAs commonly offer a second service URL. + The 'test' service does not give certificates valid in a browser, + but are more relaxed in regard to rate limits. + This allows for verfication of your own setup before switching + to the production service URL. + </p> + <div class="example"><h3>LE Test Setup</h3><pre class="prettyprint lang-config">MDCertificateAuthority https://acme-staging-v02.api.letsencrypt.org/directory</pre> +</div> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDCertificateCheck" id="MDCertificateCheck">MDCertificateCheck</a> <a name="mdcertificatecheck" id="mdcertificatecheck">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td /></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDCertificateCheck <var>name</var> <var>url</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.42 and later</td></tr> +</table> + <p> + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDCertificateFile" id="MDCertificateFile">MDCertificateFile</a> <a name="mdcertificatefile" id="mdcertificatefile">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specify a static certificate file for the MD.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDCertificateFile <var>path-to-pem-file</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + This is used inside a <code class="directive"><a href="#mdomainset">MDomainSet</a></code> and specifies + the file holding the certificate chain for the Managed Domain. The matching + key is specified via <code class="directive"><a href="#mdcertificatekeyfile">MDCertificateKeyFile</a></code>. + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config"><MDomain mydomain.com> + MDCertificateFile /etc/ssl/my.cert + MDCertificateKeyFile /etc/ssl/my.key +</MDomain></pre> +</div> + + <p> + This is that equivalent of the mod_ssl + <code class="directive"><a href="../mod/mod_ssl.html#sslcertificatefile">SSLCertificateFile</a></code> directive. It + has several uses. + </p><p> + If you want to migrate an existing domain, using static files, to + automated Let's Encrypt certificates, for one. You define the + <code class="directive"><a href="#mdomainset">MDomainSet</a></code>, add the files here and remove + the <code class="directive"><a href="../mod/mod_ssl.html#sslcertificatefile">SSLCertificateFile</a></code> from + your VirtualHosts. + </p><p> + This will give you the same as before, with maybe less repeating lines + in your configuration. Then you can add <code class="directive"><a href="#mdrenewmode">MDRenewMode</a></code> + 'always' to it and the module will get a new certificate before + the one from the file expires. When it has done so, you remove the + <code class="directive">MDCertificateFile</code> and reload the server. + </p><p> + Another use case is that you renew your Let's Encrypt certificates with + another ACME clients, for example the excellent + <a href="https://certbot.eff.org">certbot</a>. Then let your MDs point + to the files from certbot and have both working together. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDCertificateKeyFile" id="MDCertificateKeyFile">MDCertificateKeyFile</a> <a name="mdcertificatekeyfile" id="mdcertificatekeyfile">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Specify a static private key for for the static cerrtificate.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDCertificateKeyFile <var>path-to-file</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + This is used inside a <code class="directive"><a href="#mdomainset">MDomainSet</a></code> and specifies + the file holding the private key for the Managed Domain. The matching + certificate is specified via <code class="directive"><a href="#mdcertificatefile">MDCertificateFile</a></code>. + </p><p> + This is that equivalent of the mod_ssl + <code class="directive"><a href="../mod/mod_ssl.html#sslcertificatekeyfile">SSLCertificateKeyFile</a></code> directive. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDCertificateMonitor" id="MDCertificateMonitor">MDCertificateMonitor</a> <a name="mdcertificatemonitor" id="mdcertificatemonitor">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The URL of a certificate log monitor.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDCertificateMonitor name url</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDCertificateMonitor crt.sh https://crt.sh?q=</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + This is part of the 'server-status' HTML user interface and has nothing to + do with the core functioning itself. It defines the link offered on that + page for easy checking of a certificate monitor. The SHA256 fingerprint + of the certificate is appended to the configured url. + </p><p> + Certificate Monitors offer supervision of Certificate Transparency (CT) + Logs to track the use of certificates for domains. The least you may see + is that Let's Encrypt (or whichever CA you have configured) has entered + your certificates into the CTLogs. + </p><p> + Caveat: certificate logs update and monitor's intakes of those + updates suffer some delay. This varies between logs and monitors. A + brand new certificate will not be known immediately. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDCertificateProtocol" id="MDCertificateProtocol">MDCertificateProtocol</a> <a name="mdcertificateprotocol" id="mdcertificateprotocol">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The protocol to use with the Certificate Authority.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDCertificateProtocol <var>protocol</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDCertificateProtocol ACME</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + Specifies the protocol to use. Currently, only <code>ACME</code> is supported. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDCertificateStatus" id="MDCertificateStatus">MDCertificateStatus</a> <a name="mdcertificatestatus" id="mdcertificatestatus">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Exposes public certificate information in JSON.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDCertificateStatus on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDCertificateStatus on</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + When enabled, a resources is available in Managed Domains at + 'https://domain/.httpd/certificate-status' that returns a JSON + document list key properties of the current and of a renewed + certificate - when available. + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">{ + "valid-until": "Thu, 29 Aug 2019 16:06:35 GMT", + "valid-from": "Fri, 31 May 2019 16:06:35 GMT", + "serial": "03039C464D454EDE79FCD2CAE859F668F269", + "sha256-fingerprint": "1ff3bfd2c7c199489ed04df6e29a9b4ea6c015fe8a1b0ce3deb88afc751e352d" + "renewal" : { ...renewed cert information... } +}</pre> +</div> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDChallengeDns01" id="MDChallengeDns01">MDChallengeDns01</a> <a name="mdchallengedns01" id="mdchallengedns01">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td /></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDChallengeDns01 <var>path-to-command</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + Define a program to be called when the `dns-01` challenge needs to be setup/torn down. + The program is given the argument `setup` or `teardown` followed by the domain name. + For `setup` the challenge content is additionally given. + </p><p> + You do not need to specify this, as long as a 'http:' or 'https:' challenge + method is possible. However, Let's Encrypt makes 'dns-01' the only + challenge available for wildcard certificates. If you require + one of those, you need to configure this. + </p><p> + It is now possible to use this directive inside a <code class="directive"><a href="#mdomain">MDomain</a></code> + section to specify a specific command for that domain. This allows to configure + a script specific for the particular DNS provider involved. + </p><p> + See the section about wildcard certificates above for more details. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDContactEmail" id="MDContactEmail">MDContactEmail</a> <a name="mdcontactemail" id="mdcontactemail">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td /></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDContactEmail <var>address</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.42 and later</td></tr> +</table> + <p> + The ACME protocol requires you to give a contact url when you sign up. Currently, + Let's Encrypt wants an email address (and it will use it to inform you about renewals + or changed terms of service). <code class="module"><a href="../mod/mod_md.html">mod_md</a></code> uses the <code class="directive">MDContactEmail</code> directive email in + your Apache configuration, so please specify the correct address there. + If <code class="directive">MDContactEmail</code> is not present, <code class="module"><a href="../mod/mod_md.html">mod_md</a></code> will use the + <code class="directive"><a href="../mod/core.html#serveradmin">ServerAdmin</a></code> directive. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDDriveMode" id="MDDriveMode">MDDriveMode</a> <a name="mddrivemode" id="mddrivemode">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>former name of MDRenewMode.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDDriveMode always|auto|manual</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDDriveMode auto</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p>This directive exists for backward compatibility as the old name for + <code class="directive"><a href="#mdrenewmode">MDRenewMode</a></code>. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDExternalAccountBinding" id="MDExternalAccountBinding">MDExternalAccountBinding</a> <a name="mdexternalaccountbinding" id="mdexternalaccountbinding">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td /></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDExternalAccountBinding <var>key-id</var> <var>hmac-64</var> | none | <var>file</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDExternalAccountBinding none</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.52 and later</td></tr> +</table> + <p> + Configure values for ACME "External Account Binding", a feature + of the ACME standard that allows clients to bind registrations + to an existing customer account on ACME servers. + </p> + <p> + Let's Encrypt does not require those, but other ACME CAs do. + Check with your ACME CA if you need those and how to obtain the + values. They are two strings, a key identifier and a base64 encoded + 'hmac' value. + </p> + <p> + You can configure those globally or for a specific MDomain. Since + these values allow anyone to register under the same account, it is + adivsable to give the configuration file restricted permissions, + e.g. root only. + </p> + <p> + The value can also be taken from a JSON file, to keep more open + permissions on the server configuration and restrict the ones on that + file. The JSON itself is: + </p> + <div class="example"><h3>EAB JSON Example file</h3><pre class="prettyprint lang-config">{"kid": "kid-1", "hmac": "zWND..."}</pre> +</div> + <p> + If you change EAB values, the new ones will be used when the next + certificate renewal is due. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDHttpProxy" id="MDHttpProxy">MDHttpProxy</a> <a name="mdhttpproxy" id="mdhttpproxy">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Define a proxy for outgoing connections.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDHttpProxy <var>url</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p>Use a http proxy to connect to the <code class="directive"><a href="#mdcertificateauthority">MDCertificateAuthority</a></code>. Define this + if your webserver can only reach the internet with a forward proxy. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDMember" id="MDMember">MDMember</a> <a name="mdmember" id="mdmember">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Additional hostname for the managed domain.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDMember <var>hostname</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + Instead of listing all dns names on the same line, you may use + <code class="directive">MDMember</code> to add such names + to a managed domain. + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config"><MDomain example.org> + MDMember www.example.org + MDMember mail.example.org +</MDomain></pre> +</div> + <p> + If you use it in the global context, outside a specific MD, you can only + specify one value, 'auto' or 'manual' as the default for all other MDs. See + <code class="directive"><a href="#mdomain">MDomain</a></code> for a + description of these special values. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDMembers" id="MDMembers">MDMembers</a> <a name="mdmembers" id="mdmembers">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Control if the alias domain names are automatically added.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDMembers auto|manual</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDMembers auto</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p>Defines if the <code class="directive"><a href="../mod/core.html#servername">ServerName</a></code> and + <code class="directive"><a href="../mod/core.html#serveralias">ServerAlias</a></code> values of a VirtualHost + are automatically added to the members of a Managed Domain or not. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDMessageCmd" id="MDMessageCmd">MDMessageCmd</a> <a name="mdmessagecmd" id="mdmessagecmd">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Handle events for Manage Domains</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDMessageCmd <var>path-to-cmd</var> <var>optional-args</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + This command gets called when one of the following events happen for + a Managed Domain: "renewed", "installed", "expiring", "errored". The command may + be invoked for more than these in the future and ignore events + it is not prepared to handle. + </p><p> + This is the more flexible companion to <code class="directive"><a href="#mdnotifycmd">MDNotifyCmd</a></code>. + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">MDMessageCmd /etc/apache/md-message</pre> +<p><code> + +# will be invoked when a new certificate for mydomain.org is available as: +/etc/apache/md-message renewed mydomain.com + </code></p></div> + <p> + The program should not block, as the module will wait for it to finish. A + return code other than 0 is regarded as an error. + </p><p> + 'errored' is no immediate cause for concern since renewal is attempted + early enough to allow the internet to come back. This is reported at most + once per hour. + </p><p> + 'expiring' should be taken serious. It is issued when the + <code class="directive"><a href="#mdwarnwindow">MDWarnWindow</a></code> is reached. By default this is + 10% of the certificate lifetime, so for Let's Encrypt this currently + means 9 days before it expires. The warning is repeated at most once + a day. + </p><p> + 'renewed' means that a new certificate has been obtained and is stored + in the 'staging' area in the MD store. It will be activated on the next + server restart/reload. + </p><p> + 'installed' is triggered when a new certificate has been transferred from + staging into the domains location in MD store. This happens at server + startup/reload. Different to all other invocations, <code class="directive">MDMessageCmd</code> is run + with root permissions (on *nix systems) and has access to the certificate + files (and keys). Certificates needed for other applications or + in different formats can be processed on this event. + </p><p> + 'renewing' event is triggered before starting renew process for the managed + domain. Should the command return != 0 for this reason, renew will be + aborted and repeated on next cycle. Some cluster setups use this to + allow renewals to run only on a single node. + </p><p> + 'challenge-setup:type:domain' event is triggered when the challenge data for a domain has + been created. This is invoked before the ACME server is told to check for it. + The type is one of the ACME challenge types. This is invoked for every + DNS name in a MDomain. Cluster setups may use this event to distribute + challenge files to all nodes in a cluster. + </p><p> + ocsp-errored happens when <code class="directive"><a href="#mdstapling">MDStapling</a></code> + is enabled for a domain, this indicates + that an error was encountered retrieving the OCSP response from the + Certificate Authority. mod_md will continue trying. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDMustStaple" id="MDMustStaple">MDMustStaple</a> <a name="mdmuststaple" id="mdmuststaple">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Control if new certificates carry the OCSP Must Staple flag.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDMustStaple on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDMustStaple off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p>Defines if newly requested certificate should have the OCSP Must Staple flag + set or not. If a certificate has this flag, the server is required to send a + OCSP stapling response to every client. This only works if you configure + <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code> to generate this (see <code class="directive"><a href="../mod/mod_ssl.html#sslusestapling">SSLUseStapling</a></code> + and friends). + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDNotifyCmd" id="MDNotifyCmd">MDNotifyCmd</a> <a name="mdnotifycmd" id="mdnotifycmd">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Run a program when a Managed Domain is ready.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDNotifyCmd <var>path</var> [ <var>args</var> ]</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + The configured executable is run when a Managed Domain has signed up or + renewed its certificate. It is given the name of the processed MD as + additional arguments (after the parameters specified here). It should + return status code 0 to indicate that it has run successfully. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDomain" id="MDomain">MDomain</a> <a name="mdomain" id="mdomain">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Define list of domain names that belong to one group.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDomain <var>dns-name</var> [ <var>other-dns-name</var>... ] [auto|manual]</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + All the names in the list are managed as one Managed Domain (MD). + mod_md will request one single certificate that is valid for all these names. This + directive uses the global settings (see other MD directives below). If you + need specific settings for one MD, use + the <code class="directive"><a href="#mdomainset"><MDomainSet></a></code>. + </p><p> + There are 2 additional settings that are necessary for a Managed Domain: + a contact Email address (via <code class="directive"><a href="#mdcontactemail">MDContactEmail</a></code> or <code class="directive"><a href="../mod/core.html#serveradmin">ServerAdmin</a></code>) + and <code class="directive"><a href="#mdcertificateagreement">MDCertificateAgreement</a></code>. + The mail address of <code class="directive"><a href="../mod/core.html#serveradmin">ServerAdmin</a></code> + is used to register at the CA (Let's Encrypt by default). + The CA may use it to notify you about + changes in its service or status of your certificates. + </p><p> + The second setting, <code class="directive"><a href="#mdcertificateagreement">MDCertificateAgreement</a></code>, + should have the value "accepted". By specifying this, you confirm that your + accept the Terms of Service of the CA. + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">MDContactEmail admin@example.org +MDCertificateAgreement accepted +MDomain example.org www.example.org + +<VirtualHost *:443> + ServerName example.org + DocumentRoot htdocs/root + + SSLEngine on +</VirtualHost> + +<VirtualHost *:443> + ServerName www.example.org + DocumentRoot htdocs/www + + SSLEngine on +</VirtualHost></pre> +</div> + <p> + There are two special names that you may use in this directive: 'manual' + and 'auto'. This determines if a Managed Domain shall have exactly the + name list as is configured ('manual') or offer more convenience. With 'auto' + all names of a virtual host are added to a MD. Conveniently, 'auto' is also + the default. + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">MDomain example.org + +<VirtualHost *:443> + ServerName example.org + ServerAlias www.example.org + DocumentRoot htdocs/root + + SSLEngine on +</VirtualHost> + +MDomain example2.org auto + +<VirtualHost *:443> + ServerName example2.org + ServerAlias www.example2.org + ... +</VirtualHost></pre> +</div> + <p> + In this example, the domain 'www.example.org' is automatically added to + the MD 'example.org'. Similarly for 'example2.org' where 'auto' is configured + explicitly. Whenever you add more ServerAlias names to this + virtual host, they will be added as well to the Managed Domain. + </p><p> + If you prefer to explicitly declare all the domain names, use 'manual' mode. + An error will be logged if the names do not match with the expected ones. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDomainSetsection" id="MDomainSetsection"><MDomainSet></a> <a name="mdomainsetsection" id="mdomainsetsection">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Container for directives applied to the same managed domains.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code><MDomainSet <var>dns-name</var> [ <var>other-dns-name</var>... ]>...</MDomainSet></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + This is the directive <code class="directive"><a href="#mdomain">MDomain</a></code> + with the added possibility to add setting just for this MD. In fact, + you may also use "<MDomain ..>" as a shortcut. + </p> + <p> + This allows you to configure an MD that uses another Certificate Authority, + have other renewal requirements, etc. + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config"><MDomain sandbox.example.org> + MDCertificateAuthority https://someotherca.com/ACME +</MDomain></pre> +</div> + <p> + A common use case is to configure https: requirements separately for + your domains. + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config"><MDomain example.org> + MDRequireHttps temporary +</MDomain></pre> +</div> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDPortMap" id="MDPortMap">MDPortMap</a> <a name="mdportmap" id="mdportmap">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Map external to internal ports for domain ownership verification.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDPortMap <var>map1</var> [ <var>map2</var> ]</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDPortMap http:80 https:443</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + The ACME protocol provides two methods to verify domain ownership via + HTTP: one that uses 'http:' urls (port 80) and one for 'https:' urls + (port 443). If your server is not reachable by at least one + of the two, ACME may only work by configuring your DNS server, + see <code class="directive"><a href="#mdchallengedns01">MDChallengeDns01</a></code>. + </p><p> + On most public facing servers, 'http:' arrives on port 80 and + 'https:' on port 443. The module checks the ports your Apache server + is listening on and assumes those are available. This means that + when your server does not listen on port 80, it assumes that + 'http:' requests from the internet will not work. + </p><p> + This is a good guess, but it may be wrong. For example, your Apache + might listen to port 80, but your firewall might block it. 'http:' + is only available in your intranet. So, the module will falsely assume + that Let's Encrypt can use 'http:' challenges with your server. This + will then fail, because your firewall will drop those. + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">MDPortMap http:- https:8433</pre> +</div> + <p> + The above example shows how you can specify that 'http:' requests from + the internet will never arrive. In addition it says that 'https:' requests + will arrive on local port 8433. + </p><p> + This is necessary if you have port forwarding in place, your server may be + reachable from the Internet on port 443, but the local port that httpd uses is + another one. Your server might only listen on ports 8443 and 8000, but be reached + on ports 443 and 80 (from the internet). + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDPrivateKeys" id="MDPrivateKeys">MDPrivateKeys</a> <a name="mdprivatekeys" id="mdprivatekeys">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Set type and size of the private keys generated.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDPrivateKeys <var>type</var> [ <var>params</var>... ]</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDPrivateKeys RSA 2048</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + Defines what kind of private keys are generated for a managed domain and with + what parameters. You can have more than one private key type configured and + the module will obtain a certificate for each key. + </p><p> + For example, you may configure an RSA and an Elliptic Curve (EC) key, so + that 2 certificates are created for a domain. On a client connection, the first + one supported by the client will then be used. + </p><p> + Since EC keys and certificates are smaller, you might want to offer + them first for all compatible (modern) clients. This can enable + faster handshakes. Add an RSA key type to support older clients. + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">MDPrivateKeys secp256r1 rsa3072</pre> +</div> + <p> + The EC types supported depend on the CA you use. For Let's encrypt + the supported curves include 'secp256r1' and 'secp384r1'. + </p><p> + Each key and certificate type is stored in its own file in the + MD store. The key type is part of the file name with some backward + compatible naming for RSA certificates. So you may continue sharing + these files with other applications. + </p><p> + Please note that this setting only has an effect on new keys. Any existing + private key you have remains unaffected. Also, this only affects private keys + generated for certificates. ACME account keys are unaffected by this. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDRenewMode" id="MDRenewMode">MDRenewMode</a> <a name="mdrenewmode" id="mdrenewmode">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Controls if certificates shall be renewed.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDRenewMode always|auto|manual</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDRenewMode auto</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + In the default 'auto' mode, the module will do what makes most sense + of each Managed Domain. For a domain without any certificates, it will + obtain them from the Certificate Authority. + </p> + <p> + However, if you have defined an MD that is not used by any of Apache's + VirtualHosts, it will not bother. And for MDs with static certificate + files (see <code class="directive"><a href="#mdcertificatefile">MDCertificateFile</a></code>), + it assumes that you have your own source, and will not renew them either. + </p> + <p> + You can override this default in either way. If you specify 'always', + the module will renew certificates for an MD, regardless if the + domains are in use or if there are static files. + </p> + <p> + For the opposite effect, configure 'manual' and no renewal will + be attempted. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDRenewWindow" id="MDRenewWindow">MDRenewWindow</a> <a name="mdrenewwindow" id="mdrenewwindow">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Control when a certificate will be renewed.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDRenewWindow <var>duration</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDRenewWindow 33%</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + If the validity of the certificate falls below duration, mod_md + will get a new signed certificate. + </p><p> + Normally, certificates are valid for around 90 days and mod_md will renew + them the earliest 33% of their complete lifetime before they expire (so for + 90 days validity, 30 days before it expires). If you think this is not what + you need, you can specify either the exact time, as in: + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config"># 21 days before expiry +MDRenewWindow 21d +# 30 seconds (might be close) +MDRenewWindow 30s +# 10% of the cert lifetime +MDRenewWindow 10%</pre> +</div> + <p>When in auto drive mode, the module will check every 12 hours at least + what the status of the managed domains is and if it needs to do something. + On errors, for example when the CA is unreachable, it will initially retry + after some seconds. Should that continue to fail, it will back off to a + maximum interval of hourly checks. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDRequireHttps" id="MDRequireHttps">MDRequireHttps</a> <a name="mdrequirehttps" id="mdrequirehttps">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Redirects http: traffic to https: for Managed Domains.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDRequireHttps off|temporary|permanent</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDRequireHttps off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p>This is a convenience directive to ease http: to https: migration of + your Managed Domains. With: + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">MDRequireHttps temporary</pre> +</div> + <p>you announce that you want all traffic via http: URLs to be redirected + to the https: ones, for now. This is safe and you can remove this again at + any time. + </p><p> + <strong>The following has consequences: </strong>if you want client to <strong>no longer</strong> use the + http: URLs, configure: + </p> + <div class="example"><h3>Permanent (for at least half a year!)</h3><pre class="prettyprint lang-config">MDRequireHttps permanent</pre> +</div> + <p>This does two things: + </p> + <ol> + <li>All request to the <code>http:</code> resources are redirected to the + same url with the <code>https:</code> scheme using the <code>301</code> + status code. This tells clients that this is intended to be forever and + the should update any links they have accordingly. + </li> + <li>All answers to <code>https:</code> requests will carry the header + <code>Strict-Transport-Security</code> with a life time of half a year. + This tells the browser that it <strong>never</strong> (for half a year) shall use <code>http:</code> + when talking to this domain name. Browsers will, after having seen this, refuse + to contact your unencrypted site. This prevents malicious middleware to + downgrade connections and listen/manipulate the traffic. Which is good. But + you cannot simply take it back again. + </li> + </ol> + <p>You can achieve the same with <code class="module"><a href="../mod/mod_alias.html">mod_alias</a></code> and some + <code class="directive"><a href="../mod/mod_alias.html#redirect">Redirect</a></code> configuration, + basically. If you do it yourself, please make sure to exclude the paths + /.well-known/* from your redirection, otherwise mod_md + might have trouble signing on new certificates. + </p> + <p>If you set this globally, it applies to all managed domains. If you want + it for a specific domain only, use: + </p> + <div class="example"><h3>Example</h3><pre class="prettyprint lang-config"><MDomain xxx.yyy> + MDRequireHttps temporary +</MDomain></pre> +</div> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDRetryDelay" id="MDRetryDelay">MDRetryDelay</a> <a name="mdretrydelay" id="mdretrydelay">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td /></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDRetryDelay <var>duration</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDRetryDelay 5s</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.54 and later</td></tr> +</table> + <p> + The amount of time to wait after an error before trying + to renew a certificate again. This duration is doubled after + each consecutive error with a maximum of 24 hours. + </p> + <p> + It is kept separate for each certificate renewal. Meaning an error + on one MDomain does not delay the renewals of other domains. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDRetryFailover" id="MDRetryFailover">MDRetryFailover</a> <a name="mdretryfailover" id="mdretryfailover">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td /></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDRetryFailover <var>number</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDRetryFailover 13</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.54 and later</td></tr> +</table> + <p> + The number of consecutive errors on renewing a certificate before + another CA is selected. This only applies to configurations that + have more than one <code class="directive">MDCertificateAuthority</code> + specified. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDServerStatus" id="MDServerStatus">MDServerStatus</a> <a name="mdserverstatus" id="mdserverstatus">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Control if Managed Domain information is added to server-status.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDServerStatus on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDServerStatus on</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + Apaches 'server-status' handler allows you configure a resource to monitor + what is going on. This includes now a section listing all Managed Domains + with the DNS names, renewal status, lifetimes and main properties. + </p><p> + You can switch that off using this directive. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDStapleOthers" id="MDStapleOthers">MDStapleOthers</a> <a name="mdstapleothers" id="mdstapleothers">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable stapling for certificates not managed by mod_md.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDStapleOthers on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDStapleOthers on</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.42 and later</td></tr> +</table> + <p> + This setting only takes effect when <code class="directive"><a href="#mdstapling">MDStapling</a></code> is enabled. It controls + if <code class="module"><a href="../mod/mod_md.html">mod_md</a></code> should also provide stapling information for certificates + that are not directly controlled by it, e.g. renewed via an ACME CA. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDStapling" id="MDStapling">MDStapling</a> <a name="mdstapling" id="mdstapling">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable stapling for all or a particular MDomain.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDStapling on|off</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDStapling off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.42 and later</td></tr> +</table> + <p> + <code class="module"><a href="../mod/mod_md.html">mod_md</a></code> offers an implementation for providing OCSP stapling information. + This is an alternative to the one provided by <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code>. For backward + compatibility, this is disabled by default. + </p><p> + The stapling can be switched on for all certificates on the server or + for an individual <code class="directive"><a href="#mdomain">MDomain</a></code>. + This will replace any stapling configuration + in <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code> for these hosts. When disabled, the <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code> stapling + will do the work (if it is itself enabled, of course). This allows for + a gradual shift over from one implementation to the other. + </p><p> + The stapling of <code class="module"><a href="../mod/mod_md.html">mod_md</a></code> will also work for domains where the certificates + are not managed by this module (see <code class="directive"><a href="#mdstapleothers">MDStapleOthers</a></code> for how to control this). + This allows use of the new stapling without using any ACME certificate + management. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDStaplingKeepResponse" id="MDStaplingKeepResponse">MDStaplingKeepResponse</a> <a name="mdstaplingkeepresponse" id="mdstaplingkeepresponse">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Controls when old responses should be removed.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDStaplingKeepResponse <var>duration</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDStaplingKeepResponse 7d</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.42 and later</td></tr> +</table> + <p> + This time window specifies when OCSP response data used in stapling + shall be removed from the store again. Response information older than + 7 days (default) is deleted on server restart/reload. This keeps the store + from growing when certificates are renewed/reconfigured frequently. + </p><p> + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDStaplingRenewWindow" id="MDStaplingRenewWindow">MDStaplingRenewWindow</a> <a name="mdstaplingrenewwindow" id="mdstaplingrenewwindow">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Control when the stapling responses will be renewed.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDStaplingRenewWindow <var>duration</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDStaplingRenewWindow 33%</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.42 and later</td></tr> +</table> + <p> + If the validity of the OCSP response used in stapling falls below <var>duration</var>, + <code class="module"><a href="../mod/mod_md.html">mod_md</a></code> will obtain a new OCSP response. + </p><p> + The CA issuing a certificate commonly also operates the OCSP responder + service and determines how long its signed response about the validity + of a certificate are itself valid. The longer a response is valid, the longer + it can be cached which mean better overall performance for everyone. + The shorter the life time, the more rapidly certificate revocations + spread to clients. Also, service reliability is a consideration. + </p><p> + By adjusting the stapling renew window you can control parts of this yourself. + If you make the renew time short (e.g. a short time before the current + information expires), you gain maximum cache time. But a service outage + (down for maintenance, for example) will affect you. If you renew a long + time before expiry, updates will be made more frequent, cause more load + on the CA server infrastructure and also more coordination between + the child processes of your server. + </p><p> + The default is chosen as 33%, which means renewal is started when only + a third of the response lifetime is left. For a CA that issues OCSP + responses with lifetime of 3 days, this means 2 days of caching and 1 day + for renewal attempts. A service outage would have to last full 24 hours + to affect your domains. + </p><p> + Setting an absolute renew window, like `2d` (2 days), is also possible. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDStoreDir" id="MDStoreDir">MDStoreDir</a> <a name="mdstoredir" id="mdstoredir">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Path on the local file system to store the Managed Domains data.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDStoreDir <var>path</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDStoreDir md</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + Defines where on the local file system the Managed Domain data is stored. This is + an absolute path or interpreted relative to the server root. The default will create + a directory 'md' in your server root. + </p><p> + If you move this and have already data, be sure to move/copy the data first to + the new location, reconfigure and then restart the server. If you reconfigure + and restart first, the server will try to get new certificates that it thinks + are missing. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDStoreLocks" id="MDStoreLocks">MDStoreLocks</a> <a name="mdstorelocks" id="mdstorelocks">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td /></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDStoreLocks on|off|<var>duration</var></code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDStoreLocks off</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in version 2.4.55 and later</td></tr> +</table> + <p> + Enable this to use a lock file on server startup when + <code class="directive">MDStoreDir</code> is synchronized with the server + configuration and renewed certificates are activated. + </p><p> + Locking is intended for setups in a cluster that have a shared + file system for MDStoreDir. It will protect the activation of + renewed certificates when cluster nodes are restarted/reloaded + at the same time. Under the condition that the shared file + system does support file locking. + </p><p> + The default duration to obtain the lock is 5 seconds. If the log + cannot be obtained, an error is logged and the server startup will + continue. This may result in a cluster node to still use the + previous certificate afterwards. + </p><p> + A higher timeout will reduce that likelihood, but may delay server + startups/reloads in case the locks are not properly handled in + the underlying file system. A lock should only be held by a + httpd instance for a short duration. + </p> + +</div> +<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="directive-section"><h2><a name="MDWarnWindow" id="MDWarnWindow">MDWarnWindow</a> <a name="mdwarnwindow" id="mdwarnwindow">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Define the time window when you want to be warned about an expiring certificate.</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MDWarnWindow duration</code></td></tr> +<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MDWarnWindow 10%</code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_md</td></tr> +</table> + <p> + See <code class="directive"><a href="#mdrenewwindow">MDRenewWindow</a></code> for a description on + how you can specify the time. + </p><p> + The modules checks the remaining lifetime of certificates and invokes + <code class="directive"><a href="#mdmessagecmd">MDMessageCmd</a></code> when there is less than the warn + window left. With the default, this mean 9 days for certificates from + Let's Encrypt. + </p><p> + It also applies to Managed Domains with static certificate files ( + see <code class="directive"><a href="#mdcertificatefile">MDCertificateFile</a></code>). + </p> + +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_md.html" title="English"> en </a> | +<a href="../fr/mod/mod_md.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/mod/mod_md.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> +<p class="apache">Copyright 2023 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p> +<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> +</body></html>
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