Hello,
On 17.12.18 11:38, Dmitry Sytchev wrote:
Hi all! I have a question that arises in mailing list sometimes, but it is still not clear for me how to work with this.
We have AWS instance with standard Amazon bi-nat, so basically communication with external hosts works with listen udp:ip:port advertise ip:port
But in case when we need to send external call to internal network by internal ip addresses, we want to have internal host in record-route. As far as I understand, basic recommendation is to use separate port or internal address and select it with appropriate function.
Maybe it is more theoretical question, but can we do something to generate correct record-routes and VIA for calls coming from external network to make their softswitches happy, and still maintain internal address in messages going to internal hosts, using single host and port on Kamailio behind nat?
you can do also without setting advertise address for a listen socket. Just listen on local IP and then you have to use set_advertise_address(...) to set the IP in Via and record_route_preset(...) to set the Record-Route header.
Only that the config becomes a bit more complex, you have to add IF conditions when to add private or public IP addresses there.
Cheers, Daniel