User Manual of WDRT-1800AX
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5.1.17 Port filter
Port filtering is the practice of allowing or blocking (opening/closing) network packets into or out of a device or
the network based on their port number. Blocking network ports with a port filter allows administrators to restrict
specific operations such as file transfers through ports used for FTP and torrents.
Steps to follow:
1) Advanced Port Filter page
2) Enter the desired port number in the Start Port & End Port fields.
NOTE: When forwarding a range of ports, enter the start and end of the port range in the two fields.
3) Click the Protocol drop-down menu and select the appropriate protocol (TCP, UDP, or Both).
4) Click the “+” button to add the rule
Figure 5-31 Port filter
Object Description
Start port
Enter the desired port number in the Start Port
End port
Enter the desired port number in the End Port
Protocol
Select TCP, UDP or TCP+UDP
Comments
Enter the mark string, or not
Add/Del Press the “+” or “-” button to add or delete the port that you need to put in
black list
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