How To: unban IPs that are blocked by Fail2Ban

First, list the rules in all chains with numeric IPs:

iptables -n -L

e.g.:

Chain fail2ban-apache-noscript (1 references)
target     prot opt source               destination
REJECT     all  --  85.241.169.238       0.0.0.0/0            reject-with icmp-port-unreachable
RETURN     all  --  0.0.0.0/0            0.0.0.0/0

Remove banned IP in selected chain:

sudo fail2ban-client set apache-noscript unbanip 85.241.169.238