I have been running ufw + fail2ban + sshguard without any problems, until recently. On a reboot after a regular update, my iptables were messed up, causing failure of fail2ban. After several communicaitons back and forth with support, we agree that ufw is the culprit. Uninstalling ufw and rebooting works fine. Re-installing it causes problems again. Has anyone else seen such problems?
I did recently add quite a few IPs to ufw, with the same simple deny rule as I've been using; they were basically a list gleaned from fail2ban and sshguard that I decided to make more permanent. Is there some limit on how many can be added?
