Linksys WRT55AG User Manual page 36

Protocol TCP Click this checkbox if you want to forward the data transmis-
sions that use the TCP protocol.
Protocol UDP 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 External Port
FTP 21
Telnet 23
SMTP 25
DNS 53
TFTP 69
Finger 79
HTTP 80
POP3 110
NNTP 119
SNMP 161
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.
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Instant Wireless ® Series
TCP Protocol UDP Protocol
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Dual-Band Wireless A+G Broadband Router
Port Triggering Port Triggering is used for special Internet applications whose
outgoing ports differ from the incoming ports. For this feature, the Router will
watch outgoing data for specific port numbers. The Router will remember the
IP address of the computer that sends a transmission requesting data, so that
when the requested data returns through the Router, the data is pulled back to
the proper computer by way of IP address and port mapping rules. Click the
Port Triggering button to set up triggered ports, and follow these instructions:
1. Enter the
A p p l i c a t i o n
Name of the
trigger (see
Figure 7-26).
2. Enter the Outgoing Port Range used by the application. Check with the
Internet application for the port number(s) needed.
3. Enter the Incoming Port Range used by the application. Check with the
Internet application for the port number(s) needed.
4. Click the Apply button to save your changes. Click the Cancel button to
cancel your unsaved changes. Click the Close button to return to the Port
Forwarding screen.
To save your changes on this page, click the Apply button. To cancel any
unsaved changes on this page, click the Cancel button. To get more informa-
tion about the features, click the Help button.
Figure 7-26
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