14 Aug
2013
14 Aug
'13
7:51 p.m.
On 08/14/2013 11:31 AM, Daniel-Constantin Mierla wrote:
Hi,
Hello,
On 8/14/13 11:26 AM, Roberto Fichera wrote:
Mhhh!!! That's true!
On 08/14/2013 11:20 AM, Daniel-Constantin Mierla
wrote:
Hi,
detection of whether a device
is behind nat is done based on comparing source IP of the packet with the IP addresses
in the SIP message. It is no other way from application point of view.
If you look at the trace, the REGISTER has only public IP addresses, no private address.
Also, the Via header is
perfectly matching the the source IP and port of the packet. Hello,
On 8/14/13 11:16 AM, Roberto Fichera wrote:
Yes! They are behind NAT! Shouldn't kamailio detect such behaviour so it will
change the contact header and the other
fields accordingly using the nat_fix_XXXX functions? On 08/14/2013 10:19 AM, Daniel-Constantin Mierla
wrote:
Hi,
> Hello,
>
> as you can see in the REGISTER, the phone give a public IP where it can be contacted
and kamailio tries to deliver to
> that address sip:528@94.94.X.X:1274;transport=TCP
>
> REGISTER comes from another port, but that is allowed in SIP.
Yep! That's the problem
> You should disable stun in the client and let the server care of nat traversal.
As already said all client doesn't use any stun-
then how they discover the
public IP address if they are behind NAT? Or did I misunderstand that they are behind NAT?
Therefore, if the device is behind a nat in a private
network, how does it discover the public IP or the NAT router?
Is the nat router running a SIP ALG? Can you get the SIP trace on the device itself?
Good question! It's a cisco 877 but the conf doesn't have any kind of SIP related
configuration. Does it handle
transparently the SIP traffic?
Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 12.4(15)T5, RELEASE
SOFTWARE (fc4)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 01-May-08 02:31 by prod_rel_team
Cheers,
Daniel