Gnet IP104 User Manual page 34

(1.2.3.10-1.2.3.20) They can do everything (block nothing)
Others are all blocked.
Example 2:
(1.2.3.100-1.2.3.119) They can do everything except read net news (port 119) and
transfer files via FTP (port 21)
Others are all allowed.
After Inbound Packet Filter setting is configured, click the save button.
Outbound Filter:
To enable Outbound Packet Filter click the check box next to Enable in the
Outbound Packet Filter field.