Hello,

what is the outgoing transport protocol? UDP or TCP/TLS?

Cheers,
Daniel

On 26.10.21 00:51, Brooks Bridges wrote:
> 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 <[email protected]>
> 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 <[email protected]> On Behalf Of Alex 
> Balashov
> Sent: Monday, October 25, 2021 3:35 PM
> To: Kamailio (SER) - Users Mailing List <[email protected]>
> 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 <[email protected]> wrote:
>>
>> That's been set to 0 since inception and this has just recently become an 
>> issue.
>>
>> -----Original Message-----
>> From: sr-users <[email protected]> On Behalf Of Alex 
>> Balashov
>> Sent: Monday, October 25, 2021 3:19 PM
>> To: Kamailio (SER) - Users Mailing List <[email protected]>
>> 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 <[email protected]> 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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> --
> 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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-- 
Daniel-Constantin Mierla -- www.asipto.com
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