Anyone using 2 or more lines with m0n0wall or pfSense router ?

[djrobx]

I just wanted to add to this thread, since it's what shows up at the top of a google search for PFSense and VOIPo. I have a GrandStream TA.

I was experiencing 1 way audio on inbound calls once I installed PFSense. I noticed looking at the firewall logs that the external servers were attempting to connect on low ports outside the "standard" port forward ranges VOIPo recommends. The problem is caused by an outbound port remapping feature, which is enabled by default for security reasons:

https://doc.pfsense.org/index.php/Static_Port

This link describes the feature and includes instructions on enabling a "static port" which disables this feature for a specific device. Once you do that, the generally prescribed port forwarding options will work and the 1 way audio problems stop.

I had seen a few other posts suggesting setting up some specific mappings for specific external servers, but I didn't want a solution that was dependent on knowing external IPs. VOIPo might change those. I figured it had to be something simpler, since the port forwards work OK with most generic routers

[chpalmer]

I just wanted to add to this thread, since it's what shows up at the top of a google search for PFSense and VOIPo. I have a GrandStream TA.

Ive replied to a few posts over at the pfsense forums on similar subjects and since the 2011 post I made here I have turned up a few pfsense boxes for customers with VOIP. Basically if you look at the information you have already described here namely the failed attempts by the servers to connect inbound you can build firewall rules based on that. No port forwarding needed. You dont want it especially if your running more than one ATA behind your firewall. I have a few numbers here behind my primary data center and use the SIProxd package on my pfSense box. At other sites I simply have built firewall rules allowing both SIP and RTP servers access to the LAN address of the ATA on the customer LAN and have absolutely no problem.