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@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
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