User manual

U2000-2999. No prefix indicates both TCP and UDP are defined. An empty implies all port

addresses. The Packet Filter can work with the Scheduling Rules, and give the user more

flexibility on Access control. For Detail, please refer to the Scheduling Rule.

Each rule can be enabled or disabled individually.

Inbound Filter:

To enable the Inbound Packet Filter click the check box next to Enable in the Inbound

Packet Filter field.

Suppose you have a SMTP Server (25), POP Server (110), Web Server (80), FTP Server (21),

and News Server (119) defined in Virtual Server or DMZ Host.

Example 1:

(1.2.3.100-1.2.3.149) They are allowed to send mail (port 25), receive mail (port 110), and

browse the Internet (port 80)

(1.2.3.10-1.2.3.20) They can do everything (block nothing)

Others are all blocked.