[OpenSIPS-Users] sip related question: via and contact headers with 0.0.0.0

[Bogdan-Andrei Iancu]

Hi Carlos,

I do not claim to be SIP expert, but it has no sense in my opinion. Even 
more, I haven't seen anything like that. So I would say it is a bug.

My first reaction was to point to an ALG (that's something I came 
across), but if you do TLS this is out of discussion.

Shortly, I'm not aware of any legitimate case when an UAC should send 
0.0.0.0 in VIA or Contact.

Regards,

Bogdan-Andrei Iancu
   OpenSIPS Founder and Developer
   http://www.opensips-solutions.com

OpenSIPS Bootcamp 2017, Houston, US
   http://opensips.org/training/OpenSIPS_Bootcamp_2017.html

On 07/04/2017 01:44 PM, Carlos Oliva wrote:
> Hi List:
>
> This question is SIP related, I'm writing to the list just in case any 
> SIP expert can help.
>
> I'm facing random cases where some phones send to my OpenSips proxy a 
> REGISTER with VIA and CONTACT host part with 0.0.0.0 address.
>
> As far as I know this is not right, I can not see any similar in RFCs.
>
> It happens mainly with Grandstream phones, but I saw this with 3CX 
> softphones the last week.
>
> The headers look like:
>
> Via: SIP/2.0/TLS 0.0.0.0:30201;branch=z9hG4bK1519166325;rport;alias
>
> Contact: 
> <sip:MASKED-USERNAME at 0.0.0.0:30201;transport=tls>;reg-id=1;+sip.instance="<urn:uuid:00000000-0000-1000-8000-000B828E658A>"
>
> The issue happens using UDP and TLS protocol, I can discard a firewall ALG
>
> The expires header is at configured value (1200 or 120 seconds) and 
> all other headers (from, to, callId, ... ) seems to be OK
>
> My questions is: This is right according RFC or is a bug on those 
> phones? Maybe is right and I'm doing something wrong in my OpenSips 
> config?
>
> Thanks for your help,
>
> Carlos Oliva
>
>
>
>
>
>
> 	
> 	
> 	
>
>
>
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opensips.org/pipermail/users/attachments/20170704/b8bb911d/attachment.html>