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no 'host' group error (default filters) #1723
I moved from the original Debian version 0.8.x to 0.10. I'm ignoring a few warnings about default values, but I see errors about HOST not defined. Which I'm assuming could be fine. Anyway... I think either the definitions are outdated or the interpreter. Maybe I mixed them...
Steps to reproduce
Reboot or systemctl restart fail2ban. Check logs.
Assuming jail definitions are fresh, the interpreter should not complain about the lack of HOST defined. Optionally, it should not complain about issues with disabled jails.
Any additional information
The errors are mostly linked with sshd jail (and its different modes) and apache-auth, as both have multi-line definitions, not always with HOST defined.
Configuration, dump and another helpful excerpts
Relevant part of jail.local:
sshd-ddos filter (no longer needed?)
What do you see by start of 'fail2ban-client -V'
Anyway I think that something is not properly by your installation.
In the newest version you should use sshd filter with mode parameter set to ddos (or extra, or aggressive) .