Yea im a tad worried about vpn performance but we are also taking Gigabit FioS to Gigabit Fios, and 500 Meg Cable at another location so unless the VPN REALLY kills speed, it should work..
Here is what i currently have... (PS let me preface this by saying i read about this ALG-SIP Watchguard function, but i got rid of it in the M400 firewall cause it kills outgoing communicaion)..
2 ISP's in my office. Fios Gigabit / 500 Meg Optimum Cable.
Right now the 6940 is setup (and mostly working) using a static IP on the LAN, using a gateway going out over the cable isp (192.168.1.254), and OpenDNS Servers. In the phone itself, the configuration server is set in HTTPS to my external mitel IP on the FiOS, which goes into the firebox..
In theory it should be working if i take it outisde the office, plug it in say at home (also gigabit fios) and it should connect as it is here.. I don't see anything other then the local IP which i set static that would be causing it to be any different outside the office.
My firewall ports are as follows:
UDP: 69 TCP 8202-8203 TCP: 80 (My static External IP) --> 10.0.1.156 (This is the PC Phone Manager is on).
TCP: 5060 UDP: 5060 UDP: 20000-20500 (My static External IP) --> 10.0.1.10 (The Mitel 250)
UDP 6004-7039 tcp: 5004-05007 TCP: 5566 tcp: 5570 UDP: 5567 udp: 5070 udp:20001 tcp: 68-69 tcp: 6800-6802 tcp:3998-3999 udp:50098-50508 tcp:443 (this one may have to change, just noticed something), tcp: 4000 tcp:044000 (Public IP) --> 10.0.1.10