[SR-Users] Nat issue

[eyas barhouk]

Dear Mojtaba
thanks for your kind response ...

>As you mentions, Your isuue is in control-plan (signalling in IMS),Then it is not regards of NAT issue.
i though it caused by NAT at the begging but Yes it's only affect on Control plan .

>Please check your network again. also check mediation devices between
>p-cscf and user2's device, so that why the user2 doesn’t receive
I>NVITE signalling.
there is a firewall and router between the users and the proxy , after making a lot of tests i found that when the Ue receive the invite sip message and start ringing there is no 180 ringing  and 200 ok messages arrived to the proxy and the second user doesn't know if the call success  :\
in another word:

ue1 ------------invite----------->proxy--------invite------->ue2
ue1  <-------------trying -----------proxy <-------------trying ----ue2
and there is no 180 ringing ,200 ok message sent from the ue2 to the proxy .

so how could i solve this issue ?
many thanks and regards
________________________________
From: sr-users <sr-users-bounces at lists.kamailio.org> on behalf of Mojtaba <mespio at gmail.com>
Sent: Saturday, August 11, 2018 5:54 AM
To: Kamailio (SER) - Users Mailing List
Subject: Re: [SR-Users] Nat issue

Hello eyas,
The NAT issue in IMS (and VoIP) solution networks, is affected to
user-plan (e.g Voice) only. In this regards, you maybe have no-way
audio or one-way audio.
As you mentions, Your isuue is in control-plan (signalling in IMS),
Then it is not regards of NAT issue.
Please check your network again. also check mediation devices between
p-cscf and user2's device, so that why the user2 doesn’t receive
INVITE signalling.
Do you could use Multi-Homed in p-cscf or not?
With Regards.Mojtaba

On Thu, Aug 9, 2018 at 1:11 AM, eyas barhouk <eyas37 at hotmail.com> wrote:
> hello dears
>
> when i'm using kamailio 5.2 as IMS i'm facing the following NAT issue :
>
> when p-cscf handle a call from user1 to user2 that pre-registered on private
> address "192.X.X.X" (on another LAN) the user can't receive the invite
> message .
>
> in another word:
> proxy ip : 10.192.X.X
> user1 ip : 10.X.X.X
> user2 ip : 192.X.X.X
> the call scenario : user1 ---invite----> user2 (not arrived)
>
> when p-cscf handle a call from user2 that pre-registered on private IP
> "192.X.X.X" (on another LAN) to  user1 the user receive the invite message
> .
>
> the call scenario : user2 ---invite----> user1 (arrived)
>
> when both of the user on different LANs the message 200 OK doesn't arrive to
> proxy :\
>
> so based on that does any one has an experiment with NAT handling &
> nathelper module and how to configure it on P-cscf .
>
> thanks in advance
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
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>



--
--Mojtaba Esfandiari.S

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