The file to be edited is /etc/fail2ban/filter.d/proftpd.conf, of course - in my reportbug I actually typed /etc/fail2ban/filter.d by mistake.
-- Ivan Agliardi <ivan.aglia...@tetragono.com> -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
