User manual

4.6 Security Settings

4.6.1 Packet Filter

The Packet Filter enables you to control what packets are allowed to pass through the router.

The Outbound filter applies on all outbound packets. However, the Inbound filter applies on

packets that are destined to the Virtual Servers or DMZ host only. You can select one of the

two filtering policies:

1. Allow all to pass except those matching the specified rules

2. Deny all to pass except those matching the specified rules

You can specify 8 rules for each direction: inbound or outbound. For each rule, you can define

the following:

• Source IP address

• Source port address

• Destination IP address

• Destination port address

• Protocol: TCP or UDP or both.

• Use Rule#

For source or destination IP address, you can define a single IP address (4.3.2.1) or a range of

IP addresses (4.3.2.1-4.3.2.254). An empty entry 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,