Konig Electronic WLAN router 300 Mbps - Manual (Page 31)

3.3.3.1 Packet Filters
Packet Filter enables you to control what packets are allowed to pass the router. Outbound filter applies on
all outbound packets. However, Inbound filter applies on packets that destined to Virtual Servers or DMZ
host only. You can select one of the two filtering policies:
1. Allow all to pass except those match the specified rules
2. Deny all to pass except those match 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 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. Packet Filter can work with Scheduling
Rules, and give user more flexibility on Access control. For Detail, please refer to Scheduling Rule.
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:
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