Definition: A packet filter is a type of firewall. Packet filters can restrict network traffic and protect your network by rejecting packets from unauthorized hosts, using unauthorized ports or trying to connect to unauthorized IP addresses.
Packet Filter
From Tony Bradley, CISSP-ISSAP, for About.com
Explore Internet / Network Security
Must Reads
About.com Special Features
Stay connected and entertained with reviews on tips on the latest HDTVs, cellphones and more. More >
Easy ways to connect two computers for networking purposes. More >
©2009 About.com, a part of The New York Times Company.
All rights reserved.