I found a few threads on this and only one was able to get it going, and his fix did not work for me. This is a new instance and everything looked OK until I went to Firewall -> Advanced -> Advanced Settings -> and enabled Intrusion Detection Sync Firewall. Went back to Intrusion Detection and told it to sync IPs in the networks list and currently registered extensions. The next time I noticed the dashboard I saw that fail2ban was not running.
Now I get the same thing others have reported where I click Start in Intrusion Detection, it thinks for a second but it never starts. I tried turning off the sync setting as well as reinstalling the firewall from module admin with no luck.
service fail2ban start and restart both yield this
It suggests to do systemctl status fail2ban.service , which yields
I can see it trying and failing to start but I don’t see an obvious culprit.
PBX Version: 18.104.22.168
PBX Distro: 12.7.8-2104-1.sng7
Asterisk Version: 16.17.0