Filter Basics - Netopia R2020 User Reference Manual

14-32 User's Reference Guide
Example IP Filter Set Screen
This is an example of the Netopia IP filter set screen:
Enabled:
Forward:
Source IP Address:
Source IP Address Mask:
Dest. IP Address:
Dest. IP Address Mask:
Protocol Type:
Source Port Compare...
Source Port ID:
Dest. Port Compare...
Dest. Port ID:
Established TCP Conns. Only:
Return/Enter accepts * Tab toggles * ESC cancels.
Enter the IP specific information for this filter.

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).
The Netopia R2020 has the ability to compare source and destination TCP or UDP ports. These options are as
follows:
No compare
Not Equal To
Less Than
Less Than Or Equal
Equal
Greater Than or Equal
Greater Than
Change Filter
Item
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.
Yes
No
0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
TCP
No Compare
0
Equal
2000
No
What it means