Using iax on an * server behind a NAT

Asterisk Asterisk Support
1

I currently have my main asterisk server running on a public IP. I have several local phones talking to and from it.

Just recently I have added some remote phones. Because the remote phones were in a location that had a NAT, these phones needed a local asterisk server to talk to. I implemented 2nd asterisk server on that local network and the phones are talking to that server and registering the private IP’s no problem. I have setup iax so that these remote phones can call to and through my main * server on the public IP.

Up until this point everything is working fine. When I do a ‘iax2 show peers’ on my remote server behind the NAT it shows that I am connected to my main server. However, on the main server when I so a ‘iax2 show peers’ it says that my remote server is UNREACHABLE. Therefore I can only make outgoing calls on my remote network and cannot receive any from the main server. Is there something else I can do to make this server receive incoming calls as well?

This is my main server iax.conf:
555=remote server behind NAT
playpen=main server on public IP

[general]
bindport=4569
bindaddr=0.0.0.0
disallow=all
allow=ulaw
allow=alaw
allow=gsm
mailboxdetail=yes

[555]
type=friend
username=playpen
secret=password
auth=plaintext
host=69.43.65.27
context=sip
peercontext=sip
qualify=yes
trunk=yes

This is the remote server:

[general]
externin69.43.65.27
localnet=10.12.20.1/255.255.255.0
bindport=4569
bindaddr=0.0.0.0
disallow=all
allow=ulaw
allow=alaw
allow=gsm
mailboxdetail=yes

[playpen]
type=friend
username=555
secret=password
auth=plaintext
host=16.7.10.106
context=sip
peercontext=sip
qualify=yes
trunk=yes

[/i]