LevelOne 22Mbps User Manual download pdf (Page 44)

addresses (4.3.2.1-4.3.2.254). An empty implies all IP addresses.

For source or destination port, you can define a single port (80) or a range of ports (1000-1999). Add

prefix "T" or "U" to specify TCP or UDP protocol. For example, T80, U53, U2000-2999. No prefix

indicates both TCP and UDP are defined. An empty implies all port addresses.

Each rule can be enabled or disabled individually.

Inbound Filter:

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

Suppose you have 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:

(192.168.123.100-192.168.123.149) They are allow to send mail (port 25), receive mail (port 110), and

browse the Internet (port 80)

(192.168.123.10-192.168.123.20) They can do everything (block nothing)

Others are all blocked.

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LevelOne 22Mbps User Manual Page 44