Configuring The System For Use With A Firewall Or Nat; Firewall Settings - Polycom VSX 3000 Administrator's Manual

Administrator's Guide for the VSX Series

Configuring the System for Use with a Firewall or NAT

2 - 12
A firewall protects an organization's IP network by controlling data traffic
from outside the network. Unless the firewall is designed to work with H.323
video conferencing equipment, you must configure the system and the
firewall to allow video conferencing traffic to pass in and out of the network.

Firewall Settings

Network Address Translation (NAT) network environments use private
internal IP addresses for devices within the network, while using one external
IP address to allow devices on the LAN to communicate with other devices
outside the LAN. If your system is connected to a LAN that uses a NAT, you
will need to enter the NAT Public (WAN) Address so that your system can
communicate outside the LAN.
To set up the system to work with a firewall or NAT:
1. Go to System > Admin Settings > Network > IP > Firewall.
2. Configure these settings on the Firewall screen:
Setting
Fixed Ports
TCP Ports
UDP Ports
3. Select and configure these settings:
Setting
Enable H.460
Firewall Traversal
Description
Lets you specify whether to define the TCP and UDP ports.
• If the firewall is not H.323 compatible, enable this
setting. The VSX system assigns a range of ports
starting with the TCP and UDP ports you specify. The
system defaults to a range beginning with port 3230 for
both TCP and UDP.
Note: You must open the corresponding ports in the
firewall. You must also open the firewall's TCP port
1720 to allow H.323 traffic.
• If the firewall is H.323 compatible or the system is not
behind a firewall, disable this setting.
Lets you specify the beginning value for the range of TCP
and UDP ports used by the system. The system
automatically sets the range of ports based on the
beginning value you set.
Note: You must also open the firewall's TCP port 1720 to
allow H.323 traffic.
Description
Allows the system to use H.460-based firewall traversal. For
more information, refer to
page 2-13.
H.460 NAT Firewall Traversal on