Manual Netgear WNDR3400v3 (page 86 of 119) (English)

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N600 Wireless Dual Band Router WNDR3400v3

8. When you finish your chat session, your router eventually senses a period of inactivity in the

communications. The router then removes the session information from its session table,

and incoming traffic is no longer accepted on port numbers 33333 or 113.

To configure port triggering, you need to know which inbound ports the application needs.

Also, you need to know the number of the outbound port that triggers the opening of the

inbound ports. You can usually determine this information by contacting the publisher of the

application or user groups or newsgroups.

Note: Only one computer at a time can use the triggered application.

Port Forwarding to Permit External Host Communications

In both of the preceding examples, your computer initiates an application session with a

server computer on the Internet. However, you might need to allow a client computer on the

Internet to initiate a connection to a server computer on your network. Normally, your router

ignores any inbound traffic that is not a response to your own outbound traffic. You can

configure exceptions to this default rule by using the port forwarding feature.

A typical application of port forwarding can be shown by reversing the client-server

relationship from the previous web server example. In this case, a remote computer’s

browser needs to access a web server running on a computer in your local network. Using

port forwarding, you can tell the router, “When you receive incoming traffic on port 80 (the

standard port number for a web server process), forward it to the local computer at

192.168.1.123.” The following sequence shows the effects of the port forwarding rule you

have defined:

1. The user of a remote computer opens a browser and requests a web page from

www.example.com, which resolves to the public IP address of your router. The remote

computer composes a web page request message with the following destination

information:

Destination address. The IP address of www.example.com, which is the address of your

router.

Destination port number. 80, which is the standard port number for a web server

process.

The remote computer then sends this request message through the Internet to your

router.

2. Your router receives the request message and looks in its rules table for any rules covering

the disposition of incoming port 80 traffic. Your port forwarding rule specifies that incoming

port 80 traffic should be forwarded to local IP address 192.168.1.123. Therefore, your router

modifies the destination information in the request message:

The destination address is replaced with 192.168.1.123.

Your router then sends this request message to your local network.

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Others manual(s) of Netgear WNDR3400v3

Netgear WNDR3400v3 Installation Guide - English - 2 pages

Netgear WNDR3400v3 Installation Guide - German - 2 pages

Netgear WNDR3400v3 User Manual - German - 134 pages

Netgear WNDR3400v3 Installation Guide - Dutch - 2 pages

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