The plugins monitors failed encryted server to server (S2S) communication between a remote server and the local server.
Here's an example how how this plugin works: [Prosody failed encrypted S2S communication statistics for jabber.hot-chilli.net](https://www.hot-chilli.net/munin/hot-chilli.net/tethys.hot-chilli.net/loggrep_prosodys2sfails.html)
Create a file */etc/munin/plugin-conf.d/loggrep_prosodys2sfails* (we don't want change the standard file */etc/munin/plugin-conf.d/munin-node* as future updates might want to undo the changes) and put the following into it:
```
[loggrep_prosodys2sfails]
user root
env.regex_outencfailed outgoing s2s stream .* closed: Encrypted server-to-server communication is required but was not offered
env.title Prosody failed encrypted S2S communication
```
Edit */etc/munin/munin.conf* - in our case we have a Munin host named *tethys.hot-chilli.net*, please add it under the specifications for your own host: