LevelOne WBR-6012 - Manual (Page 48)

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To enable Outbound Packet Filter click the check box next to Enable in the Outbound
Packet Filter field.
Example 1:
Router LAN IP is 192.168.12.254
(192.168.12.100-192.168.12.149) Located hosts are only allowed to send mail (port 25),
receive mail (port 110), and browse Internet (port 80); port 53 (DNS) is necessary to resolve
the domain name.
(192.168.12.10-192.168.12.20) Located hosts can do everything (block nothing)
Others are all blocked.