[Ekiga-list] STUN registration

[Damien Sandras]

Hi Wolfgram,

Le samedi 23 décembre 2006 à 21:01 +0100, Wolfram Wagner a écrit :
> Thanks for your reply. It took a while until I had time again.
> 
> Please remember, I have problems with registration and get a 404 not 
> found message.
>  Last time you answered me, that I should sniff a bit. So I did.
> 
> I found out, that registration at STUN server is done maybe by using a 
> wrong IP. My current IP is 84.159.48.129.
> 
> 
> In STUN Registration I see contact binding:
> 	URI: <sip:wolfram.wagner at 84.159.61.31:5073;transport=udp>
> 
> Then my client sends SUBSCRIBE using the same wrong IP Address.
> 
> Next I get a 404 Error (not found) telling me 
> Sent-by Address: 84.159.61.31
> Sent-by port: 5074
> ...
> RPort: 5074
> Received: 84.159.48.129
> ...
> Warning: 392 192.168.70.52:5060 "Noisy feedback tells:  pid=16986 
> req_src_ip=84.159.48.129 req_src_port=5074 
> in_uri=sip:wolfram.wagner at ekiga.net 
> out_uri=sip:wolfram.wagner at ekiga.net via_cnt==1"
> 
> 
> So I wonder where this IP 84.159.61.31 comes from. I checked it and it 
> is one of the dynamic addresses used by my provider. The check via 
> ekiga.net/ip returnes the correct ip.
> 
> After three more Register retries it gives up.
> 
> 
> Might it be possible that this wrong ip address makes problems in 
> registration. Maybe the answer packages are sent to this machine.
> 

Most probably.

Either STUN is unable to determine the correct public IP address because
of complex NAT mechanisms. Or something in between is rewriting the SIP
packets. But I must admit I'm a bit lost. Try comparing the packets sent
by Ekiga with those that you are able to snif, if they are different,
then one of the routers is changing the packets.


> Thanks and Have a very nice Christmas!
> 

Thanks, you too!!!


> Wolfram
> 
> Your last answer:
> Le vendredi 01 d?cembre 2006 ? 20:57 +0100, Wolfram Wagner a ?crit :
> 
> > I have posted it to  http://pastebin.ca/263742
> > 
> > I see a 404 Error followed by a timeout when waitung for PDU. I have 
> not 
> > enough insight to know what this means... 
> > 
> 
> The 404 is for the SUBSCRIBE (it is a normal behavior). The timeout is
> for the REGISTER.
> 
> That means that :
> - the SUBSCRIBE reaches ekiga.net
> - the REGISTER, which is identical, doesn't reach ekiga.net OR the reply
> to the REGISTER doesn't reach your internal host
> 
> Can you sniff the traffic on the routers to see what happens?
> 
> I have the feeling that one of them is either dropping the REGISTER, or
> dropping the answer to the REGISTER or simply rewriting the REGISTER in
> such a way that the answer never reaches you...
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-- 
 _      Damien Sandras
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