Polycom V500 System Administrator's Manual page 28

Administrator's Guide for the V500 System
3 - 10
6. On the Firewall page, enter this information for the first port you need to
open (such as port 1720):
Setting
Enabled
Name
Action
Source
Destination
Schedule
7. When you have opened and assigned all of the ports listed in the table on
page 3-7, review the Firewall Rules list. Check that all the ports are
correct, enabled, and assigned to the correct IP (internal) Address.
Configuring Firewall and NAT Properties
Once you've set up your router, you must configure the V500 system so that it
works with the firewall and NAT.
Before making changes on the Firewall screen, you should know whether or
not your firewall device is H.323 compatible. Firewall devices that are H.323
compatible have been programmed with logic that can detect H.323 video
conferencing traffic as it passes between the LAN and WAN. Because of this,
they are able to open the necessary ports dynamically as needed, on a
call-by-call basis.
Some firewall devices can even insert the NAT Public WAN Address
automatically during the H.323 call. For these devices, it is not necessary to
configure the V500 system with fixed ports or even, in some cases, with NAT.
Check with the manufacturer of your device to see if it supports H.323
compatibility.
Description
Click this radio button.
Any unique identifier (for example, you can use the
text from the Function column in the table on page
3-7).
Click Allow.
Interface: WAN
IP Range Start: *
IP Range End: (blank)
Interface: LAN
IP Range Start: The IP address (internal) that the NAT
has assigned to your system.
IP Range End: (blank)
Protocol: TCP, UDP, or * for both
Port Range: The specific port or the starting and
ending value of the range of ports (see the table on
page 3-7 for the list of ports).
Click Always (or select a time for the port to be open).