[Serusers] Help me in config ser and sipxtapi!

[Greger V. Teigre]

If you are behind a symmetric NAT and your stun-server is not 
multiplexed on SER's 5060 port (which is not the case), you should NOT 
use the public IP and port found with STUN, as a new connection to your 
SER server will get a new port on your NAT.
Or, use nat_uac_test("16") to test for a mismatch in received port and 
contact port, which it seems you already do, as SER is sending back to 
the correct (received) port.
g-)

Phan Van Duc wrote:
> I am using the sipXtapi library in a user agent.
> When running behind NAT (with STUN and rport enabled)and register
> with ser 0.9.6(basic configuration).It appears that the library 
> detects the
> external address correctly and registered successful. But I see in the
>
> Register message, in Via and Contact field some strange things, hence 
> when ser send Invite message
> for Calling, the user agent do not received Invite message because the 
> port ser send Invite to
> user agent do not match with the port user agent listen to.
>
>
> 1. sipxtapi(sipxEzphone or CrossTalk):
> Received stun message from stun server (Vovida stun server):
> Attribute: MAPPED-ADDRESS
>     Attribute Type: MAPPED-ADDRESS (0x0001)
>     Port: 28766
>     IP:
> 222.255.15.252 <http://222.255.15.252> (222.255.15.252 
> <http://222.255.15.252>)
>
> Send Register message to ser:
> Via: SIP/2.0/UDP 222.255.15.252:28766 
> <http://222.255.15.252:28766>;branch=z9hG4bK-bdec6870a8f0;rport
>
>
> 2. Ser reply trying message:
> Via: SIP/2.0/UDP 222.255.15.252:28766 
> <http://222.255.15.252:28766>;branch=z9hG4bK-bdec6870a8f0;rport=37171
> Warning: 392 xxx.xxx.xxx.xxx :5060 "Noisy feedback tells:  pid=29560 
> req_src_ip=
> 222.255.15.252 <http://222.255.15.252> req_src_port=37171 
> in_uri=sip:xxx.xxx.xxx.xxx out_uri=sip:xxx.xxx.xxx.xxx via_cnt==1"
>
> 3. sipxtapi send Register message with Authorization:
> Via: SIP/2.0/UDP
> 222.255.15.252:37171 
> <http://222.255.15.252:37171>;branch=z9hG4bK-16af3dfa110f;rport
>
> As above, ser will send Invite or Bye message to user agent in 
> 222.255.15.252:37171 <http://222.255.15.252:37171>
> , of course user agent using sipxtapi
> can not receive these message.
> Can I make the change in ser config? plz help me.
> Thanks in advance,
> Phan Duc
>
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