About AdamsCoGovt

Never really got any tangible progression. Ultimately, we decided to stop pursuing the issue and wait for our new phone system upgrade after the first of the year. The 3COM system we're using isn't supported any longer and has issues with NAT traversal. One thing we also did was purchase an InGate Siperator so that our future SIP provider traffic will not pass through the PA-500 and instead will be parallel to the firewall. Managed to find a hardly-used unit on Ebay for way less than retail price. ... View more

Unfortunately, our old 3COM VCX doesn't have all those fancy options.. I'm anticipating our switch to NEC Spherical in the near future.. Until then, I'm stuck trying to fiddle with App Override and NAT rules. I've been working with Palo Alto for a few weeks now and we've still have no luck getting audio to enter the network from outside the firewall. Audio has no problem exiting, though. ... View more

I'd also really like to know how you got past this. Facing an identical issue and I'm at a loss. ... View more

Packet capture on a laptop running a SIP client shows that packets are being received on the external unit, but packets are hitting the NAT and being dropped when trying to re-enter the network. PBX has a static NAT to an external IP. External unit registers via PBX external. External unit makes call. PBX connects to internal phone and sets up the call. Internal phone takes the call and tries to communicate with external unit via default dynamic-port-and-ip NAT (different IP than PBX external). Traffic flows from internal to external via default NAT, but not vice versa. The issue is that the traffic cannot re-enter the network via the dynamic-port-and-ip NAT. Our old Juniper SRX-240B did not have this issue, as it would route all SIP traffic back out the PBX external IP in it's default behavior (from what I've been told). This would utilize the static NAT and not the dynamic NAT. Still working with someone from Palo Alto.. ... View more