LevelOne WBR-3402TX - Manual (Page 41)

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(192.168.123.100-192.168.123.149) They are 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.
(192.168.123.10-192.168.123.20) They can do everything (block nothing)
Others are all blocked.
Example 2:
(192.168.123.100-192.168.123.119) They can do everything except read net news (port 119) and
transfer files via FTP (port 21)
Others are allowed
After Outbound Packet Filter setting is configured, click the save button.