- Plesk 12.5 for Linux
The following errors could be found in
fail2ban.filter : WARNING Unable to find a corresponding IP address for 2001:db8:f61:a1ff:0:0:0:80: [Errno -9] Address family for hostname not supported
Fail2Ban does not officially support IPv6 protocol.
The status of supporting IPv6 by Fail2Ban could be found at its official page on GitHub