How to configure asterisk belind adsl router

i have Asterisk PBX belind ADSL Router.

one sip client out of adsl router, and other one inside.

how can i set sip.conf to support between sipclient.

i set nat all tcp and udp, but outside sipclient can’t hear any voice(can receive sip invite and registed)


you’ll need to setup sip.conf with your external address, and also UDP port-forward the RTP ports specified in rtp.conf to your Asterisk box.

the wiki at has information on NAT setups.