[SR-Users] Kamailio with CGNAT

[Amar Tinawi]

Hello
Although my question it's not related to Kamailio directly, but i think
someone could help in this strange behavior

in our tests, we have some clients under private networks, where the
provider of those networks implements CGNAT (NAT444) for it's customers to
reach internet
(Client Private IP) --->(Home router: Private to Private NAT)--->(FW with
CGNAT)---------------------------->(Kamailio Proxy Public IP)


Registration is performing fine, but making calls from this client had
strange problem as follow:

Client -------------INVITE--------------> Proxy
Proxy -------------Trying---------------->Client
Proxy--------------INVITE---------> Called Party

The called party should send Ringing msg, but the massage get lost
somewhere and didn't reach to the Proxy. Although all the IP's in sip
massages are public
i tried with STUN/TURN and NAThelper module solutions, but didn't help

is there any way to slove CGNAT with SIP in Kamailio?


Thanks in Advance
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