Trying to get Grandstreams and Cisco 7960s to work behind fw

Asterisk Asterisk Support
1

Hi all,

I’ve installed OpenBSD 3.9 onto a box that I want to use as my firewall. I have a few Cisco 7960’s and a few Grandstream phones that I want to get working behind them. I’ve done a little research, and I found out that these phones don’t work with NAT very well. I was reading on voip-info.org and it said somewhere that I need to install a proxy to get the phones to work using NAT.

Can anyone push me in the right direction on a good howto, or could someone explain to me exactly what I need to do to get these phones to work?

Thanks in advance!

2

where does Asterisk fit into this picture ?

3

My apologies. Asterisk isn’t on the BSD box - it’s set up just fine. I’m just trying to figure out how to get these phones to contact the Asterisk server.

I guess I shouldn’t have posted in this forum, but I figured people might know how to get this to work in the BSD forums.

4

if the phones are on the same network as Asterisk there are no NAT issues for the phones (unless you use reinvites). you then only need to worry about poking holes/port forwards for Asterisk.

there don’t appear to be many people using BSD as a platform for Asterisk … yet !!

5

The Asterisk server is on an external IP. The phones are on a different network, behind an OpenBSD 3.9 firewall.

I’m in charge of installing a new firewall for the office because our current one just sucks. The only difference is that when I implement the new firewall, none of the computers behind the firewall is going to have an external IP address - they will all be 10.30.1.0/24 - same goes for the phones. Our current setup with the phones are to give them each their own IP, but I want to free up some IP addresses and get the phones to work behind the firewall.

Any ideas?