Port Forwarding - Linksys WRT51AB User Manual

Port Forwarding

The Port Forwarding screen sets up public services on your network, such as
web servers, ftp servers, e-mail servers, or other specialized Internet applica-
tions. (Specialized Internet applications are any applications that use Internet
access to perform functions such as videoconferencing or online gaming. Some
Internet applications may not require any forwarding.)
Note: Any PC whose port is being forwarded should have its DHCP
client function disabled and a new static IP address assigned to it
because its IP address may change when using the DHCP function.
Customized Applications In the field provided, enter the name you wish to
give each application.
External Port For each application, enter the number of the External Ports
(the port numbers seen by users on the Internet) in the appropriate fields. (To
find out the port range, check your application's documentation.) If there is
only one External Port, enter its number in both External Port fields.
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Instant Wireless
Figure 6-24
Series Dual-Band Wireless A+B Broadband Router
®
TCP Protocol Click this checkbox if you want to forward the data transmis-
sions that use the TCP protocol.
UDP Protocol Click this checkbox if you want to forward the data transmis-
sions that use the UDP protocol.
IP Address For each application, enter the IP Address of the PC running the
specific application.
Enable Click the Enable checkbox to enable port forwarding for the relevant
application.
The following table shows the typical port forwarding settings for common
Internet applications.
Applications
FTP
Telnet
SMTP
DNS
TFTP
Finger
HTTP
POP3
NNTP
SNMP
To apply any of the settings you change on this page, click the Apply button. To
cancel any changes you've entered on this page, click the Cancel button. To get
more information about the features, click the Help button.
External Port TCP Protocol
Ö
21
Ö
23
Ö
25
53
69
Ö
79
Ö
80
Ö
110
Ö
119
161
UDP Protocol
Ö
Ö
Ö
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