3Com BR-6574N manual Single value, or a range like 20-50. If you

	single value, or a range (like 20-50). If you
	need to input more than one port number and
	they’re not contiguous, list all port numbers
	here and separate them by comma ( , ). If the
	application does not use TCP port, leave it
	blank.
UDP Port to Open)	Input the UDP port number required by the
	special application, the port number can be a
	single value, or a range (like 20-50). If you
	need to input more than one port number and
	they’re not contiguous, list all port numbers
	here and separate them by comma ( , ). If the
	application does not use UDP port, leave it
	blank.
Comment	You can input any text here to help you
	remember the purpose of this item. This is
	optional.
Select Game	This router comes with a numerous port
	mapping settings of network games. If the
	game you wish to set is listed here, you can
	select it from dropdown menu.
	After a game is selected, click ‘Add’ (the one
	next to ‘Select Game’ dropdown list) to add the
	connection parameters to all respective fields.
Add	Click this button to add a new port mapping
	rule to special applications table.
Reset	Click this button to remove all values in every
	field.

All existing special application mappings will be displayed in this page. To delete one or more mappings, check the box of the mapping, then click ‘Delete Selected’ button to remove the mapping. To delete all existing mappings, click ‘Delete All’ button. If you want to uncheck all boxes, click ‘Reset’.