Used on Centos 5.5

>> /etc/fail2ban/filter.d/qmail-pop3.conf
--- start cut --
[Definition]

# Option:  failregex
# Notes.:  regex to match the password failures messages in the logfile. The
# host must be matched by a group named "host". The tag "<HOST>" can # be used for standard IP/hostname matching and is only an alias for
#          (?:::f{4,6}:)?(?P<host>\S+)
# Values:  TEXT
#

failregex = vchkpw-pop3: vpopmail user not found .*:<HOST>

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#
ignoreregex =
--- end cut ---


>> jail.conf

[qmail-pop3]
enable  = true
filter  = qmail-pop3
action  = shorewall
sendmail[name="Qmail Pop3 user fail", dest=changet...@yourdomain.com]
logpath = /your/path/to/pop3/logs
maxretry = 3
bantime = 600

=================================
T.Bogdan
Sys & Net Admin
Direkt Network
http://www.direkt.ro

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