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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
commit6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch)
tree1ce8673d4aaa948e5554000101f46536a1e4cc29 /docs/manual/mod/mod_remoteip.html.en
parentInitial commit. (diff)
downloadapache2-upstream/2.4.57.tar.xz
apache2-upstream/2.4.57.zip
Adding upstream version 2.4.57.upstream/2.4.57
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<?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">
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+<title>mod_remoteip - Apache HTTP Server Version 2.4</title>
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+<p class="apache">Apache HTTP Server Version 2.4</p>
+<img alt="" src="../images/feather.png" /></div>
+<div class="up"><a href="./"><img title="&lt;-" alt="&lt;-" src="../images/left.gif" /></a></div>
+<div id="path">
+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <a href="./">Modules</a></div>
+<div id="page-content">
+<div id="preamble"><h1>Apache Module mod_remoteip</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_remoteip.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_remoteip.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a></p>
+</div>
+<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Replaces the original client IP address for the connection
+with the useragent IP address list presented by a proxies or a load balancer
+via the request headers.
+</td></tr>
+<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>remoteip_module</td></tr>
+<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_remoteip.c</td></tr></table>
+<h3>Summary</h3>
+
+ <p>This module is used to treat the useragent which initiated the
+ request as the originating useragent as identified by httpd for the
+ purposes of authorization and logging, even where that useragent is
+ behind a load balancer, front end server, or proxy server.</p>
+
+ <p>The module overrides the client IP address for the connection
+ with the useragent IP address reported in the request header configured
+ with the <code class="directive"><a href="#remoteipheader">RemoteIPHeader</a></code> directive.</p>
+
+ <p>Additionally, this module implements the server side of
+ HAProxy's
+ <a href="http://blog.haproxy.com/haproxy/proxy-protocol/">PROXY Protocol</a> when
+ using the <code class="directive"><a href="#remoteipproxyprotocol">RemoteIPProxyProtocol</a></code>
+ directive.</p>
+
+ <p>Once replaced as instructed, this overridden useragent IP address is
+ then used for the <code class="module"><a href="../mod/mod_authz_host.html">mod_authz_host</a></code>
+ <code class="directive"><a href="../mod/mod_authz_core.html#require">Require ip</a></code>
+ feature, is reported by <code class="module"><a href="../mod/mod_status.html">mod_status</a></code>, and is recorded by
+ <code class="module"><a href="../mod/mod_log_config.html">mod_log_config</a></code> <code>%a</code> and <code class="module"><a href="../mod/core.html">core</a></code>
+ <code>%a</code> format strings. The underlying client IP of the connection
+ is available in the <code>%{c}a</code> format string.</p>
+
+ <div class="warning">It is critical to only enable this behavior from
+ intermediate hosts (proxies, etc) which are trusted by this server, since
+ it is trivial for the remote useragent to impersonate another
+ useragent.</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>Topics</h3>
+<ul id="topics">
+<li><img alt="" src="../images/down.gif" /> <a href="#processing">Remote IP Processing</a></li>
+</ul><h3 class="directives">Directives</h3>
+<ul id="toc">
+<li><img alt="" src="../images/down.gif" /> <a href="#remoteipheader">RemoteIPHeader</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#remoteipinternalproxy">RemoteIPInternalProxy</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#remoteipinternalproxylist">RemoteIPInternalProxyList</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#remoteipproxiesheader">RemoteIPProxiesHeader</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#remoteipproxyprotocol">RemoteIPProxyProtocol</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#remoteipproxyprotocolexceptions">RemoteIPProxyProtocolExceptions</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#remoteiptrustedproxy">RemoteIPTrustedProxy</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#remoteiptrustedproxylist">RemoteIPTrustedProxyList</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__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_remoteip">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_remoteip">Report a bug</a></li></ul><h3>See also</h3>
+<ul class="seealso">
+<li><code class="module"><a href="../mod/mod_authz_host.html">mod_authz_host</a></code></li>
+<li><code class="module"><a href="../mod/mod_status.html">mod_status</a></code></li>
+<li><code class="module"><a href="../mod/mod_log_config.html">mod_log_config</a></code></li>
+<li><a href="http://www.haproxy.org/download/1.8/doc/proxy-protocol.txt">Proxy Protocol Spec</a></li>
+<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="section">
+<h2><a name="processing" id="processing">Remote IP Processing</a></h2>
+
+ <p>Apache by default identifies the useragent with the connection's
+ client_ip value, and the connection remote_host and remote_logname are
+ derived from this value. These fields play a role in authentication,
+ authorization and logging and other purposes by other loadable
+ modules.</p>
+
+ <p>mod_remoteip overrides the client IP of the connection with the
+ advertised useragent IP as provided by a proxy or load balancer, for
+ the duration of the request. A load balancer might establish a long
+ lived keepalive connection with the server, and each request will
+ have the correct useragent IP, even though the underlying client IP
+ address of the load balancer remains unchanged.</p>
+
+ <p>When multiple, comma delimited useragent IP addresses are listed in the
+ header value, they are processed in Right-to-Left order. Processing
+ halts when a given useragent IP address is not trusted to present the
+ preceding IP address. The header field is updated to this remaining
+ list of unconfirmed IP addresses, or if all IP addresses were trusted,
+ this header is removed from the request altogether.</p>
+
+ <p>In overriding the client IP, the module stores the list of intermediate
+ hosts in a remoteip-proxy-ip-list note, which <code class="module"><a href="../mod/mod_log_config.html">mod_log_config</a></code>
+ can record using the <code>%{remoteip-proxy-ip-list}n</code> format token.
+ If the administrator needs to store this as an additional header, this
+ same value can also be recording as a header using the directive
+ <code class="directive"><a href="#remoteipproxiesheader">RemoteIPProxiesHeader</a></code>.</p>
+
+ <div class="note"><h3>IPv4-over-IPv6 Mapped Addresses</h3>
+ As with httpd in general, any IPv4-over-IPv6 mapped addresses are recorded
+ in their IPv4 representation.</div>
+
+ <div class="note"><h3>Internal (Private) Addresses</h3>
+ All internal addresses 10/8, 172.16/12, 192.168/16, 169.254/16 and 127/8
+ blocks (and IPv6 addresses outside of the public 2000::/3 block) are only
+ evaluated by mod_remoteip when <code class="directive"><a href="#remoteipinternalproxy">RemoteIPInternalProxy</a></code>
+ internal (intranet) proxies are registered.</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="RemoteIPHeader" id="RemoteIPHeader">RemoteIPHeader</a> <a name="remoteipheader" id="remoteipheader">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Declare the header field which should be parsed for useragent IP addresses</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RemoteIPHeader <var>header-field</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_remoteip</td></tr>
+</table>
+ <p>The <code class="directive"><a href="#remoteipheader">RemoteIPHeader</a></code> directive triggers
+ <code class="module"><a href="../mod/mod_remoteip.html">mod_remoteip</a></code> to treat the value of the specified
+ <var>header-field</var> header as the useragent IP address, or list
+ of intermediate useragent IP addresses, subject to further configuration
+ of the <code class="directive"><a href="#remoteipinternalproxy">RemoteIPInternalProxy</a></code> and
+ <code class="directive"><a href="#remoteiptrustedproxy">RemoteIPTrustedProxy</a></code> directives. Unless these
+ other directives are used, <code class="module"><a href="../mod/mod_remoteip.html">mod_remoteip</a></code> will trust all
+ hosts presenting a <code class="directive"><a href="#remoteipheader">RemoteIPHeader</a></code> IP value.</p>
+
+ <div class="example"><h3>Internal (Load Balancer) Example</h3><pre class="prettyprint lang-config">RemoteIPHeader X-Client-IP</pre>
+</div>
+
+ <div class="example"><h3>Proxy Example</h3><pre class="prettyprint lang-config">RemoteIPHeader X-Forwarded-For</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="RemoteIPInternalProxy" id="RemoteIPInternalProxy">RemoteIPInternalProxy</a> <a name="remoteipinternalproxy" id="remoteipinternalproxy">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Declare client intranet IP addresses trusted to present the RemoteIPHeader value</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RemoteIPInternalProxy <var>proxy-ip</var>|<var>proxy-ip/subnet</var>|<var>hostname</var> ...</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_remoteip</td></tr>
+</table>
+ <p>The <code class="directive"><a href="#remoteipinternalproxy">RemoteIPInternalProxy</a></code> directive adds one
+ or more addresses (or address blocks) to trust as presenting a valid
+ RemoteIPHeader value of the useragent IP. Unlike the
+ <code class="directive"><a href="#remoteiptrustedproxy">RemoteIPTrustedProxy</a></code> directive, any IP address
+ presented in this header, including private intranet addresses, are
+ trusted when passed from these proxies.</p>
+
+ <div class="example"><h3>Internal (Load Balancer) Example</h3><pre class="prettyprint lang-config">RemoteIPHeader X-Client-IP
+RemoteIPInternalProxy 10.0.2.0/24
+RemoteIPInternalProxy gateway.localdomain</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="RemoteIPInternalProxyList" id="RemoteIPInternalProxyList">RemoteIPInternalProxyList</a> <a name="remoteipinternalproxylist" id="remoteipinternalproxylist">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Declare client intranet IP addresses trusted to present the RemoteIPHeader value</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RemoteIPInternalProxyList <var>filename</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_remoteip</td></tr>
+</table>
+ <p>The <code class="directive"><a href="#remoteipinternalproxylist">RemoteIPInternalProxyList</a></code> directive specifies
+ a file parsed at startup, and builds a list of addresses (or address blocks)
+ to trust as presenting a valid RemoteIPHeader value of the useragent IP.</p>
+
+ <p>The '<code>#</code>' hash character designates a comment line, otherwise
+ each whitespace or newline separated entry is processed identically to
+ the <code class="directive"><a href="#remoteipinternalproxy">RemoteIPInternalProxy</a></code> directive.</p>
+
+ <div class="example"><h3>Internal (Load Balancer) Example</h3><pre class="prettyprint lang-config">RemoteIPHeader X-Client-IP
+RemoteIPInternalProxyList conf/trusted-proxies.lst</pre>
+</div>
+
+ <div class="example"><h3>conf/trusted-proxies.lst contents</h3><pre># Our internally trusted proxies;
+10.0.2.0/24 #Everyone in the testing group
+gateway.localdomain #The front end balancer</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="RemoteIPProxiesHeader" id="RemoteIPProxiesHeader">RemoteIPProxiesHeader</a> <a name="remoteipproxiesheader" id="remoteipproxiesheader">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Declare the header field which will record all intermediate IP addresses</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RemoteIPProxiesHeader <var>HeaderFieldName</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_remoteip</td></tr>
+</table>
+ <p>The <code class="directive"><a href="#remoteipproxiesheader">RemoteIPProxiesHeader</a></code> directive specifies
+ a header into which <code class="module"><a href="../mod/mod_remoteip.html">mod_remoteip</a></code> will collect a list of
+ all of the intermediate client IP addresses trusted to resolve the useragent
+ IP of the request. Note that intermediate
+ <code class="directive"><a href="#remoteiptrustedproxy">RemoteIPTrustedProxy</a></code> addresses are recorded in
+ this header, while any intermediate
+ <code class="directive"><a href="#remoteipinternalproxy">RemoteIPInternalProxy</a></code> addresses are discarded.</p>
+
+ <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">RemoteIPHeader X-Forwarded-For
+RemoteIPProxiesHeader X-Forwarded-By</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="RemoteIPProxyProtocol" id="RemoteIPProxyProtocol">RemoteIPProxyProtocol</a> <a name="remoteipproxyprotocol" id="remoteipproxyprotocol">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enable or disable PROXY protocol handling</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RemoteIPProxyProtocol On|Off</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_remoteip</td></tr>
+<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>RemoteIPProxyProtocol is only available in httpd 2.4.31 and newer</td></tr>
+</table>
+ <p>The <code class="directive">RemoteIPProxyProtocol</code> directive enables or
+ disables the reading and handling of the PROXY protocol connection header.
+ If enabled with the <code>On</code> flag, the upstream client <em>must</em>
+ send the header every time it opens a connection or the connection will
+ be aborted unless it is in the list of disabled hosts provided by the
+ <code class="directive"><a href="#remoteipproxyprotocolexceptions">RemoteIPProxyProtocolExceptions</a></code>
+ directive.</p>
+
+ <p>While this directive may be specified in any virtual host, it is
+ important to understand that because the PROXY protocol is connection
+ based and protocol agnostic, the enabling and disabling is actually based
+ on IP address and port. This means that if you have multiple name-based
+ virtual hosts for the same host and port, and you enable it for any one of
+ them, then it is enabled for all of them (with that host and port). It also
+ means that if you attempt to enable the PROXY protocol in one and disable
+ in the other, that won't work; in such a case, the last one wins and a
+ notice will be logged indicating which setting was being overridden.</p>
+
+ <pre class="prettyprint lang-config">Listen 80
+&lt;VirtualHost *:80&gt;
+ ServerName www.example.com
+ RemoteIPProxyProtocol On
+
+ #Requests to this virtual host must have a PROXY protocol
+ # header provided. If it is missing, the connection will
+ # be aborted
+&lt;/VirtualHost&gt;
+
+Listen 8080
+&lt;VirtualHost *:8080&gt;
+ ServerName www.example.com
+ RemoteIPProxyProtocol On
+ RemoteIPProxyProtocolExceptions 127.0.0.1 10.0.0.0/8
+
+ #Requests to this virtual host must have a PROXY protocol
+ # header provided. If it is missing, the connection will
+ # be aborted except when coming from localhost or the
+ # 10.x.x.x RFC1918 range
+&lt;/VirtualHost&gt;</pre>
+
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="RemoteIPProxyProtocolExceptions" id="RemoteIPProxyProtocolExceptions">RemoteIPProxyProtocolExceptions</a> <a name="remoteipproxyprotocolexceptions" id="remoteipproxyprotocolexceptions">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Disable processing of PROXY header for certain hosts or networks</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RemoteIPProxyProtocolExceptions host|range [host|range] [host|range]</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_remoteip</td></tr>
+<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>RemoteIPProxyProtocolExceptions is only available in httpd 2.4.31 and newer</td></tr>
+</table>
+ <p>The <code class="directive">RemoteIPProxyProtocol</code> directive enables or
+ disables the reading and handling of the PROXY protocol connection header.
+ Sometimes it is desirable to require clients to provide the PROXY header, but
+ permit other clients to connect without it. This directive allows a server
+ administrator to configure a single host or CIDR range of hosts that may do
+ so. This is generally useful for monitoring and administrative traffic to a
+ virtual host direct to the server behind the upstream load balancer.</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="RemoteIPTrustedProxy" id="RemoteIPTrustedProxy">RemoteIPTrustedProxy</a> <a name="remoteiptrustedproxy" id="remoteiptrustedproxy">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Declare client intranet IP addresses trusted to present the RemoteIPHeader value</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RemoteIPTrustedProxy <var>proxy-ip</var>|<var>proxy-ip/subnet</var>|<var>hostname</var> ...</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_remoteip</td></tr>
+</table>
+ <p>The <code class="directive"><a href="#remoteiptrustedproxy">RemoteIPTrustedProxy</a></code> directive adds one
+ or more addresses (or address blocks) to trust as presenting a valid
+ RemoteIPHeader value of the useragent IP. Unlike the
+ <code class="directive"><a href="#remoteipinternalproxy">RemoteIPInternalProxy</a></code> directive, any intranet
+ or private IP address reported by such proxies, including the 10/8, 172.16/12,
+ 192.168/16, 169.254/16 and 127/8 blocks (or outside of the IPv6 public
+ 2000::/3 block) are not trusted as the useragent IP, and are left in the
+ <code class="directive"><a href="#remoteipheader">RemoteIPHeader</a></code> header's value.</p>
+
+ <div class="example"><h3>Trusted (Load Balancer) Example</h3><pre class="prettyprint lang-config">RemoteIPHeader X-Forwarded-For
+RemoteIPTrustedProxy 10.0.2.16/28
+RemoteIPTrustedProxy proxy.example.com</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="RemoteIPTrustedProxyList" id="RemoteIPTrustedProxyList">RemoteIPTrustedProxyList</a> <a name="remoteiptrustedproxylist" id="remoteiptrustedproxylist">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Declare client intranet IP addresses trusted to present the RemoteIPHeader value</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RemoteIPTrustedProxyList <var>filename</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_remoteip</td></tr>
+</table>
+ <p>The <code class="directive"><a href="#remoteiptrustedproxylist">RemoteIPTrustedProxyList</a></code> directive specifies
+ a file parsed at startup, and builds a list of addresses (or address blocks)
+ to trust as presenting a valid RemoteIPHeader value of the useragent IP.</p>
+
+ <p>The '<code>#</code>' hash character designates a comment line, otherwise
+ each whitespace or newline separated entry is processed identically to
+ the <code class="directive"><a href="#remoteiptrustedproxy">RemoteIPTrustedProxy</a></code> directive.</p>
+
+ <div class="example"><h3>Trusted (Load Balancer) Example</h3><pre class="prettyprint lang-config">RemoteIPHeader X-Forwarded-For
+RemoteIPTrustedProxyList conf/trusted-proxies.lst</pre>
+</div>
+
+ <div class="example"><h3>conf/trusted-proxies.lst contents</h3><p><code>
+ # Identified external proxies;<br />
+ 192.0.2.16/28 #wap phone group of proxies<br />
+ proxy.isp.example.com #some well known ISP
+ </code></p></div>
+
+</div>
+</div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_remoteip.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_remoteip.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</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&amp;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>
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