A-Link WNAP4G User Manual page 62

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Destination port
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Protocol: TCP or UDP or both.
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Use Rule#
For source or destination IP address, you can define a single IP address (4.3.2.1) or
a range of IP addresses (4.3.2.1-4.3.2.254). An empty implies all IP addresses.
For source or destination port, you can define a single port (80) or a range of ports
(1000-1999). Add prefix "T" or "U" to specify TCP or UDP protocol. For example,
T80, U53, U2000-2999, No prefix indicates both TCP and UDP are defined. An
empty implies all port addresses. Packet Filter can work with Scheduling Rules,
and give user more flexibility on Access control. For Detail, please refer to
Scheduling Rule.
Each rule can be enabled or disabled individually.
Afterwards, click on "Save" to store your settings or click "Undo" to give up the
changes.
A-LINK WNAP4G User Manual
62