[SR-Users] t_relay changing source IP?

[Brooks Bridges]

apologies, I missed the second half of your post.  We do not, and I know I could explicitly tell it to use that IP, however I am more interested in figuring out what might cause it to decide to use the interface IP, seemingly without a clear reason.  I am not a fan of static configuration of things like that in shared environments.

-----Original Message-----
From: Brooks Bridges
Sent: Monday, October 25, 2021 3:48 PM
To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
Subject: RE: [SR-Users] t_relay changing source IP?

Correct.

listen=lo:5060
listen=eth0:5060
listen=eth1:5060
listen=XXX.XXX.XXX.XXX:5060  (<--- HA IP)

-----Original Message-----
From: sr-users <sr-users-bounces at lists.kamailio.org> On Behalf Of Alex Balashov
Sent: Monday, October 25, 2021 3:35 PM
To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
Subject: Re: [SR-Users] t_relay changing source IP?

I take it you have listeners on both the interface IP and the HA IP?

Absent ‘mhomed=1’, do you regulate egress interface selection for all t_relay() cases with $fs explicitly? If not, try that.

> On Oct 25, 2021, at 6:25 PM, Brooks Bridges <bbridges at call48.com> wrote:
>
> That's been set to 0 since inception and this has just recently become an issue.
>
> -----Original Message-----
> From: sr-users <sr-users-bounces at lists.kamailio.org> On Behalf Of Alex Balashov
> Sent: Monday, October 25, 2021 3:19 PM
> To: Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> Subject: Re: [SR-Users] t_relay changing source IP?
>
> Does the behaviour differ depending on whether ‘mhomed’ is on?
>
> https://www.kamailio.org/wiki/cookbooks/5.5.x/core#mhomed
>
>> On Oct 25, 2021, at 6:15 PM, Brooks Bridges <bbridges at call48.com> wrote:
>>
>> So we have a box that's bound to all interfaces on the server, and one specific IP address (that is an HA IP), and I've run into a bit of an odd behavior that I cannot explain.
>>
>> For 99.9999% of our traffic, the invites come into the HA IP, and then are forwareded out the HA IP to an SBC for further processing.  In a very rare instance however, I have found that there is an invite coming in the HA IP, and for some unknown reason it gets forwarded out the *interface* ip instead of the HA IP.
>>
>> For example:
>>
>> Working:
>> 1.2.3.4 -- invite --> 9.8.7.6 (ha IP) -- invite --> 5.6.7.8 (sbc)
>>
>> Non working:
>> 1.2.3.4 -- invite --> 9.8.7.6 (ha IP) *something happens here* 9.8.7.5 (interface IP) -- invite --> 5.6.7.8 (sbc)
>>
>> I've been through tm, tmx, and the incoming invite of a working and non working request with a fine toothed comb and I cannot for the life of me explain this behavior.  Any thoughts?
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> --
> Alex Balashov | Principal | Evariste Systems LLC
>
> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>
>
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> Important: keep the mailing list in the recipients, do not reply only to the sender!
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--
Alex Balashov | Principal | Evariste Systems LLC

Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/


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Important: keep the mailing list in the recipients, do not reply only to the sender!
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