[SIPForum-discussion] BroadSoft Client Behind a NAT

[Barry Weiss]

I believe that the firewall that your Broadsoft client is behind has SIP
Fixup enabled (or some sort of Sip Header Transformation). That is why the
IP in the Via doesn't match the IP in the Contact.

Check out this site, it explains how to disable Sip Fixup

http://www.twist-networks.com/support/kb-article/disable-sip-fixup

<http://www.twist-networks.com/support/kb-article/disable-sip-fixup>Barry

2010/8/4 Pablo Gargini <pgargini at gmail.com>

> Hi Guillermo
>
> I think the call doesn't progress, because the format call-ID is not
> correct, should be xxx @ host-origin.
> Additionally the two calls have different User-Agent.
>
> Bad-call X-Lite
> Good-Call Yealink
> Thanks
> Pablo
>
>
>
>
> El 2 de agosto de 2010 11:13, Zuñiga, Guillermo <
> Guillermo.Zuniga at cwpanama.com> escribió:
>
>>  HI Fellows.
>>
>> I have the following issue:
>>
>> I have some Broadsoft-Clients behind a NAT and a Firewall, and sometimes
>> one of the customer can’t make calls.
>>
>> In this case my SBC-Acme is sending 403-Forbidden when the call fail.
>>
>> Seeing into the traces I can see in the failed call that the uri-host in
>> the contact header is the Private IP and
>>
>> Not the Public IP,
>>
>>
>>
>> Have you any idea why this could be happened? Could be this the cause of
>> getting  403 from the Acme?
>>
>> Any suggestion for the customer site?
>>
>>
>>
>> Thanks a lot for your helps.
>>
>> Attach both traces of the calls.
>>
>>
>>
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>
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