[Freeswitch-users] NAT issue with registration responses going to the wrong port

[Alex Kinch]

Certainly.. Here's one I made earlier. Can do a more up to date and in  
depth one if you want more.


recv 411 bytes from udp/[78.105.3.165]:54650 at 11:53:47.177619:
REGISTER sip:78.129.213.17 SIP/2.0
Via: SIP/2.0/UDP  
192.168.1.14:5060;rport;branch=z9hG4bK-17288995091520442185
From: <sip:1000 at 78.129.213.17>;tag=14010403471368437451
To: <sip:1000 at 78.129.213.17>
Call-ID: 14569447621195546119 at 192.168.1.14
CSeq: 1 REGISTER
Contact: <sip:1000 at 192.168.1.14:5060>
Max-Forwards: 70
User-Agent: Rainbow R2821 VL[SIP-V3.3] SN/001870300007
Expires: 600
Content-Length: 0


sent 644 bytes to udp/[78.105.3.165]:54650 at 11:53:47.182659:
SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP  
192.168.1.14 
: 
5060 
;rport=54650;branch=z9hG4bK-17288995091520442185;received=78.105.3.165

recv 661 bytes from udp/[78.105.3.165]:54650 at 11:53:47.515660:
REGISTER sip:78.129.213.17 SIP/2.0
Via: SIP/2.0/UDP 192.168.1.14:5060;branch=z9hG4bK343144464537279199
From: <sip:1000 at 78.129.213.17>;tag=14010403471368437451
To: <sip:1000 at 78.129.213.17>
Call-ID: 14569447621195546119 at 192.168.1.14
CSeq: 2 REGISTER
Contact: <sip:1000 at 192.168.1.14:5060>
Authorization: Digest username="1000", realm="78.129.213.17",  
nonce="3b442f98-becc-45eb-b079-21b6ce5e657e", uri="sip:78.129.213.17",  
response="7558e0a1325c375d6921c1be6a701d82", algorithm=MD5, qop=auth,  
cnonce="234abcc436e2667097e7fe6eia53e8dd", nc=00000001
Max-Forwards: 70
User-Agent: Rainbow R2821 VL[SIP-V3.3] SN/001870300007
Expires: 600
Content-Length: 0


sent 549 bytes to udp/[78.105.3.165]:5060 at 11:53:47.517710:
SIP/2.0 200 OK
Via: SIP/2.0/UDP  
192.168.1.14:5060;branch=z9hG4bK343144464537279199;received=78.105.3.165




On 7 Jul 2008, at 14:44, Brian West wrote:

> Sip trace..
>
> TPORT_LOG=1 ./freeswitch
>
>
> On Jul 7, 2008, at 7:46 AM, Alex Kinch wrote:
>
>> Hi gang,
>>
>> Got a strange problem with a NAT'd device that's trying to connect to
>> FS. The first REGISTER arrives, without auth, and FS responds with  
>> 401
>> Unauthorized to the correct port on the external IP address of the
>> firewall. However when the second attempt to REGISTER, this time with
>> auth, comes in, FS responds with 200 OK to the local SIP port
>> specified on the device. The device obviously doesn't get the 200 OK
>> so keeps attempting to register.
>>
>> Any ideas? Tried sip-force-contact but that doesn't seem to help.
>>
>> Alex
>
> Brian West
> sip:brian at freeswitch.org
>
>
>
>
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