Is there a /var/log/fail2ban.log file present?
ls -al /var/log/fail2ban.log
mine is owned by root:root and has 600 permissions
What fail2ban do you have installed?
fail2ban-client --version | head -1
Also how was it installed? Manually, or by repo?
Is it enforcing? Check it with
iptables -L fail2ban-SSH -n
Are there any entries in the output?
The fail2ban jail looks "funny". I have several fail2bans installed and I've never seen any fail2ban jail on any of them.
Please let us know.