Draytek VIGOR 3300 User Manual page 83

Source IP
Subnet Mask
Source Port
Vigor3300 Series User's Guide
It means the source IP address. Placing the symbol "!" before a
particular IP address will prevent this rule from being applied to
that IP address. It is equal to the logical NOT operator.
It means the subnet mask for the source IP.
It means the port for the source IP. Type the values in the boxes
of start port and end port. As for the operators
If the Start Port column is empty, the Start Port and the End
Port column will be ignored. The filter rule will filter out any
port number.
(=) - If the End Port column is empty, the filter rule will set the
port number to be the value of the Start Port column.
Otherwise, the port number ranges from the Start Port to the
End Port including the Start Port and the End Port.
(!=) - If the End Port column is empty, the port number is not
equal to the value of the Start Port column. Otherwise, this
port number is not between the Start Port and the End Port
including the Start Port and End Port.
(>) - Specifies the port number is larger than or equal to the
Start Port.
(<) - Specifies the port number is less than or equal to the Start
Port.
79