Filter
Top Products
Chapter 3 - Configuring Network Use
© Polycom, Inc. 3 - 11
Configuring the System for Use with a Firewall or NAT
A firewall protects your 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.
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:
Setting Description
Fixed Ports Lets you specify whether to define the TCP and UDP ports.
• If the firewall is not H.323 compatible, enable this option. The
V500 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 if the system is not
behind a firewall, disable this option.
TCP Ports
UDP Ports
Lets you specify the beginning value for the range of TCP and
UDP ports used by the system.
NOTE: You must also open the firewall’s TCP port 1720 to
allow H.323 traffic.