Fail2ban-unban
From Karmaking
fail2ban-client set YOURJAILNAMEHERE unbanip IPADDRESSHERE
The hard part is finding the right jail:
Use iptables -L -n to find the rule name... ...then use fail2ban-client status to get the actual jail names. The rule name and jail name may not be the same but it should be clear which one is related to which.
