Re: [Monitorix-general] fail2ban filter for Monitorix

[Jordi S. <jo...@fi...>]

Hello,

The following filter for fail2ban should suffice:


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~8<~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Fail2Ban filter for Monitorix (HTTP built-in server)
#

[INCLUDES]

before = common.conf

[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
#

_daemon = monitorix-httpd

failregex = NOTEXIST - \[<HOST>\] .*
             AUTHERR - \[<HOST>\] .*
             NOTALLOWED - \[<HOST>\] .*

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#
ignoreregex =
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~8<~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Just let me know if it works for you, and if so, I'll push a new request 
to the fail2ban project to include it.

Regards.



On 4/2/20 10:09 AM, Narcis Garcia via Monitorix-general wrote:
> htpasswd method with system's crypt() is pretty weak to face brute-force
> attacks.
> 
> Does somebody have written an adequate fail2ban filter for http attacks
> to Monitorix?
> 
> Thank you.
> 

-- 
Jordi Sanfeliu
FIBRANET Network Services Provider
https://www.fibranet.cat