As far as i understand, Kamailio is probably in a Datacenter somewhere and the Asterisk box is in an Office without any public IP address forwarding data directly to the Asterisk. The best solution I can think of  (in terms of security and ease of use) is using a VPN between Kamailio and your client's Asterisk box. 
Kamailio would forward all SIP messages to Asterisk via the VPN connection (OpenVPN is a very good solution) and RTPEngine would also have to be set up on the Kamailio box. 

Without a VPN, you could use the Contact of Path modules and have your Asterisk register on Kamailio, but you would have to do some code because of the NAT issues. 
I would keep things simple, set up a VPN and have Kamailio and Asterisk "think" they're on the same network. 


Sérgio Charrua


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On Mon, Jul 24, 2023 at 10:16 AM John shuku <john.shuki@yahoo.com> wrote:

the problem is not NAT . 

My Asterisk does not have any public IP Address . How can I proxy the registration requests from kamailio ( with Public IP Address ) to asterisk ( With private IP address ) . 

The goal is to allow remote users to register in my asterisk server . 


Am Montag, 24. Juli 2023 um 10:34:52 MESZ hat Lewis Hutchinson <lewis.hutchinson@missionlabs.co.uk> Folgendes geschrieben:


This is always a good place to start https://www.fredposner.com/1457/kamailio-behind-nat/

Lewis




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