User`s manual

81
802.11n WLAN ADSL2+ Router
Port Forwarding
Your device has built in advanced Security features that protect your network by
blocking unwanted trafc from the Internet.
If you simply want to connect from your local network to the Internet, you do not
need to make any changes to the default Security conguration. You only need to edit
the conguration if you wish to do one or both of the following:
allow Internet users to browse the user pages on your local network (for ex-•
ample, by providing an FTP or HTTP server)
play certain games which require accessibility from the Internet•
This chapter describes how to congure Security to suit the needs of your net-
work.
By default, the IP addresses of your LAN PCs are hidden from the Internet. All
data sent from your LAN PCs to a PC on the Internet appears to come from the IP
address of your device.
In this way, details about your LAN PCs remain private. This security feature is
called PortForwarding.
Conguring Port Forwarding
Certain network games, chat or le sharing software do not work with your default
Port Forwarding setting. Your device knows the port, protocol and trigger information
needed to allow access to the common applications listed below, but by default, ac-
cess to them is disabled.
Application
TCP port
number
UDP port
number
Trigger re-
quired?
E-mail
110, 25
N/A
false
News
119
N/A
false
MSN Messenger
1863
N/A
false
Yahoo! Instant Messenger
5050 5055
5100
N/A
false
AOL Instant Messenger
5190
N/A
false