Difference between revisions of "Talk:ProFTPd"

Revision as of 03:49, 6 October 2011

failregex = USER \S+: no such user found from \S* ?\[<HOST>\] to \S+\s*$

/var/log/secure:Jul 3 14:33:30 xkmail proftpd[12639]: xkmail.hopto.org (pe1950-2.sni.ne.jp[61.7.1.109]) - USER adriana: no such user found from pe1950-2.sni.ne.jp [61.7.1.109] to 71.105.58.80:21

I got hit by this about 1400 times today but fail2ban did not jail ip address.

Is the jail.conf wrong? kevin@xkmail.hopto.org ver .80 fedora 4

# Fail2Ban configuration file
#
# Author: Yaroslav Halchenko
#
# $Revision: 510 $
#

[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 = USER \S+: no such user found from \S* ?\[<HOST>\] to \S+\s*$

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

As Yaroslav Halchenko mentioned right in the mailing list each failregex has 
to contain \s+$ at the end, expect the one for "no such user found from" there 
is a \s* for zero or more whitespaces needed.

[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 = \(\S+\[<HOST>\]\)[: -]+ USER \S+: no such user found from \S+ \[[0-9.]+\] to \S+:\S+$
failregex = \(\S+\[<HOST>\]\)[: -]+ USER \S+: no such user found from \S+ \[[0-9.]+\] to \S+:\S+\s*$
            \(\S+\[<HOST>\]\)[: -]+ USER \S+ \(Login failed\): Incorrect password\.\s+$
            \(\S+\[<HOST>\]\)[: -]+ USER \S+ \(Login failed\): No such user found\.\s+$
            \(\S+\[<HOST>\]\)[: -]+ SECURITY VIOLATION: \S+ login attempted\.\s+$
            \(\S+\[<HOST>\]\)[: -]+ Maximum login attempts \(\d+\) exceeded\s+$

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

I've just tested it with fail2ban 0.8.2-3 on Debian etch 4.0 Before this change i had also the problem,
that fail2ban didn't react on bad login attempts on ftp.

Latest working settings for ProFTPD on CentOS:

Set jail.conf proftpd section to log /var/log/secure

Edit regex setting in /etc/fail2ban/filter.d/proftpd.conf

replace existing regex setting with this one:

failregex = ^(.)+proftpd(.)+\[<HOST>\](.)*no such user found from (.)* to (.)*$
		^(.)+proftpd(.)+\[<HOST>\](.)*USER(.)*Login failed(.)*Incorrect password(.)*$
		^(.)+proftpd(.)+\[<HOST>\](.)*SECURITY VIOLATION:(.)*login attempted(.)*$
		^(.)+proftpd(.)+\[<HOST>\](.)*Maximum login attempts(.)*exceeded(.)*$ 

Test with: -regex /var/log/secure /etc/fail2ban/filter.d/proftpd.conf