I've upgraded from 12.x to 12.5 and I noticed Fail2ban isn't properly working. When I took a look at the log file i'm getting a few error messages regarding missing files?
2015-09-21 07:15:51,987 fail2ban.action [31802]: ERROR iptables -n -L INPUT | grep -q 'f2b-plesk-proftpd[ \t]' -- stdout: ''
2015-09-21 07:15:51,988 fail2ban.action [31802]: ERROR iptables -n -L INPUT | grep -q 'f2b-plesk-proftpd[ \t]' -- stderr: ''
2015-09-21 07:15:51,988 fail2ban.action...
Plesk 12.5 - Fail2ban not working
2015-09-21 07:15:51,987 fail2ban.action [31802]: ERROR iptables -n -L INPUT | grep -q 'f2b-plesk-proftpd[ \t]' -- stdout: ''
2015-09-21 07:15:51,988 fail2ban.action [31802]: ERROR iptables -n -L INPUT | grep -q 'f2b-plesk-proftpd[ \t]' -- stderr: ''
2015-09-21 07:15:51,988 fail2ban.action...
Plesk 12.5 - Fail2ban not working