- Plesk for Linux
When switching on Fail2ban jail(s) at Plesk > Tools & Settings > IP Address Banning (Fail2Ban) > Jails the message about successfull operation appears:
PLESK_INFO: Jails are enabled succesfully
However, the following warning message appear in Fail2Ban log file
CONFIG_TEXT: fail2ban.transmitter : WARNING Command ['stop', '<jail-name>'] has failed. Received UnknownJailException('<jail-name>',)
fail2ban.jail : INFO Jail '<jail-name>' started
#PPPM-8105 "Enabling a disabled Fail2ban jail no longer results in misleading errors being written to the ‘/var/log/fail2ban.log’ file."
- Plesk Obsidian 12 May 2020 (Linux)
If update is not possible for some reason you may try the following
This is expected behavior, the warning message can be safely ignored in this scenario.