Huawei EchoLife HG520 User Manual page 45

For Destination Interface, if you select LAN, the filter rule
will apply to packets whose destination is in the specified
range of IP addresses of your LAN.
If you select WAN, the filter rule will apply to packets whose
destination is in the specified range of IP addresses of the
WAN side.
If you select both, the filter rule will apply to packets to both
sides.
For Protocol, select the transmission protocol from the
drop-down list. You can select TCP, UDP, ICMP or Any.
For Schedule, if you select Always, the rules set above will
always be applied. On the other hand, you can set the period
during which the filter rule will be applied from Time and Day
drop-down list.
After configuration, click Apply to save the settings, or click Clear
to clear the settings.
II. MAC Filters
Through MAC filter configuration, you can deny LAN computers
to access Internet.
Figure 3-23 MAC filters configuration—status
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