Edimax BR-6524n Manual page 122

If the service you wish to deny or allow is not listed, you can use 'User
Define Service' table to add a new service of your own:
Here are descriptions of every setup items:
Item Name
Protocol
Port Range
Click 'Add' to add this IP address restriction rule to the list (and back to
previous page), or click 'Reset' to clear all texts in every field.
When you finished with the settings in this page, you can click 'Apply'
button to save changes you made in this page, or you can click 'Cancel'
to discard changes. After you click 'Apply' button, you'll see the
following messages:
Description
Please select the protocol type of this service:
TCP or UDP, or 'Both'.
Please input the port range if this service. For
a single port number, just input the number of
service port (like '110').
If this service consists multiple continuous
ports, you can input '110-120' for port number
110 to 120, or '110,115,120' for port number
110, 115, and 120.