Fail2ban

I followed the manual -> https://www.virtualmin.com/documentation/security/fail2ban and activate some jails because i see a lot of errors in my logs, and test with enter 6 or more times through SSH and not blocked to me

iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination

Chain FORWARD (policy ACCEPT) target prot opt source destination

Chain OUTPUT (policy ACCEPT) target prot opt source destination

And i not view anything in iptables, What can I do to make it work?