Netopia Router PN Series - Manual (Page 158)

7-16 Reference Guide
■ Too much reliance on packet filters can cause too little reliance
on other security methods. Filter sets are
not a substitute for
password protection, effective safeguarding of passwords,
caller ID, the “must match” option in the answer profile, PAP or
CHAP in connection profiles, callback, and general awareness
of how your network may be vulnerable.
An approach to using filters
The ultimate goal of network security is to prevent unauthorized
access to the network without compromising authorized access.
Using filter sets is part of reaching that goal.
Each filter set you design will be based on one of the following
approaches:
■ That which is not expressly prohibited is permitted.
■ That which is not expressly permitted is prohibited.
It is strongly recommended that you take the latter, and safer,
approach to all of your filter set designs.
Working with IP filters and filter sets
This section covers IP filters and filter sets. For working with IPX
filters and filter sets, see
“IPX filters,” beginning on page 5-8 .
To work with filters and filter sets, begin by accessing the filter set
screens.
Note: Make sure you understand how filters work before attempting
to use them. Read the section
“About filters and filter sets,”
beginning on page 7-6 .
Main
Menu Advanced
Config.
Filter
Sets IP
Filter Sets