Polycom VSX Series manual Setting Description TCP Ports, UDP Ports, Setting Description Enable

	Configuring Network Use
Setting	Description
TCP Ports	Lets you specify the beginning value for the range of TCP
UDP Ports	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.

3.Select and configure these settings:

Setting	Description
Enable	Allows the system to use H.460-based firewall traversal. For
NAT/Firewall	more information, refer to H.460 NAT Firewall Traversal on
Traversal	page 3-18.
NAT Configuration	Lets you specify whether the system should determine the
	NAT Public WAN Address automatically.
	• If the system is behind a NAT that allows HTTP traffic,
	select Auto.
	• If the system is behind a NAT that does not allow HTTP
	traffic, select Manual.
	• If the system is not behind a NAT or is connected to the
	IP network through a Virtual Private Network (VPN),
	select Off.
	• If the system is behind a firewalled NAT router that is
	UPnP (Universal Plug and Play) certified, select UPnP.
	Many routers used in homes and small businesses
	support UPnP NAT traversal. If this is your situation, try
	selecting UPnP first. If this selection does not work for
	your router, select Auto or Manual.
NAT Public (WAN)	Displays the address that callers from outside the LAN use
Address	to call your system. If you chose to configure the NAT
	manually, enter the NAT Public Address here.
NAT is H.323	Specifies that the system is behind a NAT that is capable of
Compatible	translating H.323 traffic.
Address Displayed	Lets you choose whether to display this system’s public or
in Global Directory	private address in the global directory.

Visit the Polycom Security Center at www.polycom.com for timely security information. Systems deployed outside a firewall are potentially vulnerable to unauthorized access. You can also register to receive periodic email updates and advisories.

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