At some point while running
iptables -S on an Ubuntu 18.04.2 LTS system with Fail2ban installed, I noticed that the following lines were missing:
-A f2b-sshd -j RETURN
What command should I run to regenerate the f2b-sshd chain and all the rules associated with it? I tried running
fail2ban-client restart, but this doesn't appear to have any effect.