14 Aug
2013
14 Aug
'13
12:32 p.m.
On 08/14/2013 04:36 PM, Vitaliy Aleksandrov wrote:
If you won't be able to disable SIP ALG on your
router you can fill $avp(received) manually before calling save():
$avp(received) = "sip:" + $si + ":" + $sp +
";transport=" + $proto;
In this case all user location records will have the "received" attribut even
if a UA isn't behind NAT, but I don't
see any problems with that.
This one looks working, but the callee doesn't answer correctly because the TCP
isn't correct:
Contact::
<sip:528@94.94.X.X:1380;transport=TCP;ob>;q=;expires=294;flags=0x0;cflags=0x0;state=0;socket=<tcp:178.79.X.X:5060>;methods=0x1FDF;received=<sip:94.94.X.X:37030;transport=tcp>;user_agent=<PJSUA
v2.1-svn Linux-3.10.5.201/x86_64/glibc-2.17>;reg-id=0
The contact uses a port which isn't translated inside by the router, the received
field shows the right one.
Should I change the Contact header instead? In case, how can I do that?
Cheers,
Roberto Fichera.
On 08/14/2013 11:51 AM, Roberto Fichera wrote:
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On 08/14/2013 11:31 AM, Daniel-Constantin Mierla
wrote:
Hi,
Ok! There are two commands to
disable it, since it's enabled by default!!!
no ip nat service sip tcp port 5060
no ip nat service sip udp port 5060
I'll test it right now!
Hello,
On 8/14/13 11:26 AM, Roberto Fichera wrote:
> On 08/14/2013 11:20 AM, Daniel-Constantin Mierla wrote:
>
> Hi,
>
>> Hello,
>>
>> On 8/14/13 11:16 AM, Roberto Fichera wrote:
>>> 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?
> 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?
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.
Mhhh!!! That's
true!
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
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