I recently installed Fail2Ban on an Ubuntu 12.04.5 server and it’s working great. Now I want to setup Munin so it can monitor it and generate graphs/reports. I found that Munin has a built-in Fail2Ban plugin that can be enabled like this:
sudo ln -s /usr/share/munin/plugins/fail2ban /etc/munin/plugins/fail2ban
Did that and restarted Munin like this:
sudo service munin-node restart
And waited 5-10 minutes for reports to be generated. And while there is a Fail2Ban area in the server report, all images are broken. Why? What can I do to fix this?