Nat Traversal - D-Link DVG-G5402SP User Manual

Wireless voip gateway

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DVG-G5402SP User's Manual

2-2-2 NAT Traversal

If your gateway is set up behind an Internet sharing device, you can select either the NAT or STUN

protocol.

ADVANCED → NAT TRAVERSAL

NAT Public IP: Check the box to use the IP address of the Internet sharing device if the gateway is set up

behind an Internet sharing device. Also the gateway will use the IP address of the Internet sharing device

as the public IP when it connects to Internet. Furthermore, some of the Internet sharing device's type is

symmetric NAT. You need to set Virtual Server or Port Mapping (Forwarding) from the Internet sharing

device for the listen port and communication ports (RTP ports) of the gateway.

NAT IP/Domain: Enter the real public IP address of the IP sharing device or the router; or enter a true URL

(Uniform Resource Locator) when DDNS is used. Please refer to the DDNS settings.

Note: If you are setting a public IP in this field, it has to be a static public IP, otherwise VoIP communication

may not be established properly. Please contact your ISP to check if your Internet connection has static

public IP addresses.

Enable STUN Client: Check the box to use the STUN protocol prevents problems from setting the IP

sharing function. (Some NATs do not support this protocol.)

Note: You can use the "Status

device. If the NAT type is "Symmetric NAT," then the gateway is not able to traverse the NAT. It is not a flaw

of the gateway design, but rather a limitation of the STUN protocol.

STUN Server IP/Domain and Port: Enter the IP address and listen port of the STUN server. You can set

two STUN server IPs separated by a semicolon.

Enable UPnP Control Point: Check the box to enable the gateway's IP traffic to pass through an Internet

sharing device. This function only works when the Internet sharing device supports UPnP and has it

enabled.

Note: The "Status

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STUN Inquiry" page to detect the NAT type of your Internet sharing

Current Status" page will show the status of UPnP.

ADVANCED

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