[asterisk-users] fail2ban filter issue

[John Novack]

eherr wrote:
>
> Not sure if this has been answered but I cannot find a solution.
>
> I am running Asterisk 1.4.26.3
>
Very VERY old. If you need to continue in 1.4, you should really up to the last 1.4.44
Many MANY changes and broken changes between 1.4.26 and 1.4.44

John Novack

> I am seeing the following lines in my log files:
>
> A: [2013-03-05 13:54:27] NOTICE[6928] chan_sip.c: Failed to authenticate user <sip:192.210.138.12>;tag=DmVIjOlfYiiL
>
> B: [2013-03-05 12:20:00] NOTICE[6928] chan_sip.c: Failed to authenticate user 101<sip:101 at my.asterisk.server.ip>;tag=eec630f1
>
> C: [2013-03-03 05:15:02] NOTICE[31158] chan_sip.c: Registration from '"101381"<sip:101381 at my.asterisk.server.ip>' failed for '85.25.23.129' - No matching peer found
>
> Now Two Part Question:
>
> Part 1:
>
> I understand that line C is from some soft phone like Xlite, IP phone, or program trying to register extension 101381 to my server and the user exten does not exist. I don't understand the method for A or B. I don't understand what generates that error message. Can someone explain?
>
> Part 2:
>
> Fail2ban blocks line C as per the regex in filters/asterisk.conf. What I don't understand is why doesn't lines A or B have a built in regex line? This goes back to not knowing the method that generates the error message in part 1.
>
> Also, can I update the regex in asterisk.conf,
>
> From: NOTICE.* .*: Failed to authenticate user .*@<HOST>.* <mailto:.*@%3cHOST%3e.*>
>
> To:  NOTICE.* .*: Failed to authenticate user .*
>
> It should ban both A and B, along with the original Regex line that I modified.
>
> Question is, would this present a problem under normal circumstances? I know when the line comes up with my.asterisk.server.ip it will get ignored because I am in the ignoreip list but I want to make sure it will be OK to adjust.
>
> Thanks community!
>
> -E
>
>
>
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