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diff --git a/docs/netdata-security.md b/docs/netdata-security.md index a905717d..e3ce6d56 100644 --- a/docs/netdata-security.md +++ b/docs/netdata-security.md @@ -4,16 +4,16 @@ We have given special attention to all aspects of Netdata, ensuring that everyth **Table of Contents** -1. [Your data are safe with Netdata](#your-data-are-safe-with-netdata) -2. [Your systems are safe with Netdata](#your-systems-are-safe-with-netdata) -3. [Netdata is read-only](#netdata-is-read-only) -4. [Netdata viewers authentication](#netdata-viewers-authentication) - - [Why Netdata should be protected](#why-netdata-should-be-protected) - - [Protect Netdata from the internet](#protect-netdata-from-the-internet) - - [Expose Netdata only in a private LAN](#expose-netdata-only-in-a-private-lan) - - [Use an authenticating web server in proxy mode](#use-an-authenticating-web-server-in-proxy-mode) - - [Other methods](#other-methods) -5. [Registry or how to not send any information to a third party server](#registry-or-how-to-not-send-any-information-to-a-third-party-server) +1. [Your data are safe with Netdata](#your-data-are-safe-with-netdata) +2. [Your systems are safe with Netdata](#your-systems-are-safe-with-netdata) +3. [Netdata is read-only](#netdata-is-read-only) +4. [Netdata viewers authentication](#netdata-viewers-authentication) + - [Why Netdata should be protected](#why-netdata-should-be-protected) + - [Protect Netdata from the internet](#protect-netdata-from-the-internet) + \- [Expose Netdata only in a private LAN](#expose-netdata-only-in-a-private-lan) + \- [Use an authenticating web server in proxy mode](#use-an-authenticating-web-server-in-proxy-mode) + \- [Other methods](#other-methods) +5. [Registry or how to not send any information to a third party server](#registry-or-how-to-not-send-any-information-to-a-third-party-server) ## Your data are safe with Netdata @@ -86,7 +86,6 @@ In Netdata v1.9+ there is also access list support, like this: allow connections from = localhost 10.* 192.168.* ``` - #### Use an authenticating web server in proxy mode Use one web server to provide authentication in front of **all your Netdata servers**. So, you will be accessing all your Netdata with URLs like `http://{HOST}/netdata/{NETDATA_HOSTNAME}/` and authentication will be shared among all of them (you will sign-in once for all your servers). Instructions are provided on how to set the proxy configuration to have Netdata run behind [nginx](Running-behind-nginx.md), [Apache](Running-behind-apache.md), [lighthttpd](Running-behind-lighttpd.md#netdata-via-lighttpd-v14x) and [Caddy](Running-behind-caddy.md#netdata-via-caddy). @@ -97,7 +96,8 @@ To use this method, you should firewall protect all your Netdata servers, so tha PROXY_IP="1.2.3.4" iptables -t filter -I INPUT -p tcp --dport 19999 \! -s ${PROXY_IP} -m conntrack --ctstate NEW -j DROP ``` -_commands to allow direct access to Netdata from a web server proxy_ + +*commands to allow direct access to Netdata from a web server proxy* The above will prevent anyone except your web server to access a Netdata dashboard running on the host. @@ -132,9 +132,10 @@ iptables -t filter -A netdata -j DROP iptables -t filter -D INPUT -p tcp --dport ${NETDATA_PORT} -m conntrack --ctstate NEW -j netdata 2>/dev/null # add the input chain hook (again) -# to send all new netdata connections to our filtering chain +# to send all new Netdata connections to our filtering chain iptables -t filter -I INPUT -p tcp --dport ${NETDATA_PORT} -m conntrack --ctstate NEW -j netdata ``` + _script to allow access to Netdata only from a number of hosts_ You can run the above any number of times. Each time it runs it refreshes the list of allowed hosts. @@ -143,19 +144,20 @@ You can run the above any number of times. Each time it runs it refreshes the li Of course, there are many more methods you could use to protect Netdata: -- bind Netdata to localhost and use `ssh -L 19998:127.0.0.1:19999 remote.netdata.ip` to forward connections of local port 19998 to remote port 19999. This way you can ssh to a Netdata server and then use `http://127.0.0.1:19998/` on your computer to access the remote Netdata dashboard. +- bind Netdata to localhost and use `ssh -L 19998:127.0.0.1:19999 remote.netdata.ip` to forward connections of local port 19998 to remote port 19999. This way you can ssh to a Netdata server and then use `http://127.0.0.1:19998/` on your computer to access the remote Netdata dashboard. -- If you are always under a static IP, you can use the script given above to allow direct access to your Netdata servers without authentication, from all your static IPs. +- If you are always under a static IP, you can use the script given above to allow direct access to your Netdata servers without authentication, from all your static IPs. -- install all your Netdata in **headless data collector** mode, forwarding all metrics in real-time to a master Netdata server, which will be protected with authentication using an nginx server running locally at the master Netdata server. This requires more resources (you will need a bigger master Netdata server), but does not require any firewall changes, since all the slave Netdata servers will not be listening for incoming connections. +- install all your Netdata in **headless data collector** mode, forwarding all metrics in real-time to a master Netdata server, which will be protected with authentication using an nginx server running locally at the master Netdata server. This requires more resources (you will need a bigger master Netdata server), but does not require any firewall changes, since all the slave Netdata servers will not be listening for incoming connections. ## Anonymous Statistics ### Registry or how to not send any information to a third party server The default configuration uses a public registry under registry.my-netdata.io (more information about the registry here: [mynetdata-menu-item](../registry/) ). Please be aware that if you use that public registry, you submit the following information to a third party server: -- The url where you open the web-ui in the browser (via http request referer) -- The hostnames of the Netdata servers + +- The url where you open the web-ui in the browser (via http request referer) +- The hostnames of the Netdata servers If sending this information to the central Netdata registry violates your security policies, you can configure Netdat to [run your own registry](../registry/#run-your-own-registry). @@ -163,21 +165,21 @@ If sending this information to the central Netdata registry violates your securi Starting with v1.12 Netdata also collects [anonymous statistics](anonymous-statistics.md) on certain events for: -1. **Quality assurance**, to help us understand if Netdata behaves as expected and help us identify repeating issues for certain distributions or environments. +1. **Quality assurance**, to help us understand if Netdata behaves as expected and help us identify repeating issues for certain distributions or environments. -2. **Usage statistics**, to help us focus on the parts of Netdata that are used the most, or help us identify the extent our development decisions influence the community. +2. **Usage statistics**, to help us focus on the parts of Netdata that are used the most, or help us identify the extent our development decisions influence the community. To opt-out from sending anonymous statistics, you can create a file called `.opt-out-from-anonymous-statistics` under the user configuration directory (usually `/etc/netdata`). ## Netdata directories -path|owner|permissions| Netdata |comments| -:---|:----|:----------|:--------|:-------| -`/etc/netdata`|user `root`<br/>group `netdata`|dirs `0755`<br/>files `0640`|reads|**Netdata config files**<br/>may contain sensitive information, so group `netdata` is allowed to read them. -`/usr/libexec/netdata`|user `root`<br/>group `root`|executable by anyone<br/>dirs `0755`<br/>files `0644` or `0755`|executes|**Netdata plugins**<br/>permissions depend on the file - not all of them should have the executable flag.<br/>there are a few plugins that run with escalated privileges (Linux capabilities or `setuid`) - these plugins should be executable only by group `netdata`. -`/usr/share/netdata`|user `root`<br/>group `netdata`|readable by anyone<br/>dirs `0755`<br/>files `0644`|reads and sends over the network|**Netdata web static files**<br/>these files are sent over the network to anyone that has access to the Netdata web server. Netdata checks the ownership of these files (using settings at the `[web]` section of `netdata.conf`) and refuses to serve them if they are not properly owned. Symbolic links are not supported. Netdata also refuses to serve URLs with `..` in their name. -`/var/cache/netdata`|user `netdata`<br/>group `netdata`|dirs `0750`<br/>files `0660`|reads, writes, creates, deletes|**Netdata ephemeral database files**<br/>Netdata stores its ephemeral real-time database here. -`/var/lib/netdata`|user `netdata`<br/>group `netdata`|dirs `0750`<br/>files `0660`|reads, writes, creates, deletes|**Netdata permanent database files**<br/>Netdata stores here the registry data, health alarm log db, etc. -`/var/log/netdata`|user `netdata`<br/>group `root`|dirs `0755`<br/>files `0644`|writes, creates|**Netdata log files**<br/>all the Netdata applications, logs their errors or other informational messages to files in this directory. These files should be log rotated. +| path|owner|permissions|Netdata|comments| +|:---|:----|:----------|:------|:-------| +| `/etc/netdata`|user `root`<br/>group `netdata`|dirs `0755`<br/>files `0640`|reads|**Netdata config files**<br/>may contain sensitive information, so group `netdata` is allowed to read them.| +| `/usr/libexec/netdata`|user `root`<br/>group `root`|executable by anyone<br/>dirs `0755`<br/>files `0644` or `0755`|executes|**Netdata plugins**<br/>permissions depend on the file - not all of them should have the executable flag.<br/>there are a few plugins that run with escalated privileges (Linux capabilities or `setuid`) - these plugins should be executable only by group `netdata`.| +| `/usr/share/netdata`|user `root`<br/>group `netdata`|readable by anyone<br/>dirs `0755`<br/>files `0644`|reads and sends over the network|**Netdata web static files**<br/>these files are sent over the network to anyone that has access to the Netdata web server. Netdata checks the ownership of these files (using settings at the `[web]` section of `netdata.conf`) and refuses to serve them if they are not properly owned. Symbolic links are not supported. Netdata also refuses to serve URLs with `..` in their name.| +| `/var/cache/netdata`|user `netdata`<br/>group `netdata`|dirs `0750`<br/>files `0660`|reads, writes, creates, deletes|**Netdata ephemeral database files**<br/>Netdata stores its ephemeral real-time database here.| +| `/var/lib/netdata`|user `netdata`<br/>group `netdata`|dirs `0750`<br/>files `0660`|reads, writes, creates, deletes|**Netdata permanent database files**<br/>Netdata stores here the registry data, health alarm log db, etc.| +| `/var/log/netdata`|user `netdata`<br/>group `root`|dirs `0755`<br/>files `0644`|writes, creates|**Netdata log files**<br/>all the Netdata applications, logs their errors or other informational messages to files in this directory. These files should be log rotated.| -[]() +[](<>) |