For many Linux users this will be a “Thank you, Captain Obvious” type of post, but it’s one of those things that some Webmin users might not realize. If you use Webmin’s “Linux Firewall” configuration page to configure the iptables firewall in Linux, and you click “Apply Configuration”, it will remove fail2ban‘s rules from your active iptables configuration. So, you must go to a Linux command prompt and enter service fail2ban restart — UNLESS you make a small change in the Webmin “Linux Firewall” configuration.
From the Webmin “Linux Firewall” main page, click Module Config, then on the configuration page, in the “Configurable options” section, look for the line “Command to run after applying configuration.” Click the button next to the text box on that line, and in the text box enter service fail2ban restart and then click the Save button at the bottom of the page. That’s all you need — now every time you make a firewall change and click “Apply Configuration”, it will automatically restart fail2ban for you.
5 thoughts on “Do you use Webmin to configure iptables and also run fail2ban? Don’t forget to do this!”
We use Webmin and are about to install fail2ban so this is nice to know. I was hoping there would be a fail2ban section within Webmin but it doesn’t appear there is.
NOTICE: All comments above this one were imported from the original Michigan Telephone Blog and may or may not be relevant to the edited article above.