Draytek Vigor2910 Series User Manual page 83

Port Configuration
By the way, you can set up to 40 service types. If you want to edit/delete an existed service
type, please select the radio button of that one and click Edit/Edit for modification.
Vigor2910 Series User's Guide
Click Single or Range. If you select Range, you have to type
in the starting port number and the end porting number on the
boxes below.
Port Number – Type in the starting port number and the end
porting number here if you choose Range as the type.
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