Filter Basics; Example Network - Netopia 2200 series Software User's Manual

Firewall Tutorial

Filter basics

In the source or destination IP address fields, the IP address that is entered must be the
network address of the subnet. A host address can be entered, but the applied subnet
mask must be 32 bits (255.255.255.255).
Netopia Firmware Version 7.6 has the ability to compare source and destination TCP or
UDP ports. These options are as follows:
Item
No Compare
Not Equal To
Less Than
Less Than or Equal
Equal
Greater Than or Equal
Greater Than

Example network

Input Packet
Does not compare TCP or UDP port
Matches any port other than what is defined
Anything less than the port defined
Any port less than or equal to the port defined
Matches only the port defined
Matches the port or any port greater
Matches anything greater than the port defined
Filter
Internet
What it means
IP 200.1.1.??
Data
151