Re: Term Explanation

[Valerie Anne Bubb <bubbva () incog com>]

> From: jmfreema () cscploenzke de
> To: firewall-wizards () nfr net
> Date: Tue, 8 Feb 2000 09:56:44 +0100

> I've been seeing a lot of information of various firewall products, and 
require
> a bit of help from the people that know.  Can someone give me a brief
> explanation of the following:
>
>    dynamic packet filtering
>    stateful inspection


dynamic packet filtering: the firewall "examines each data packet
as it arrives.  Based on information in the packet, state retained
from previous events, and a set of security policy rules, the 
firewall either passes the data packet, or blocks and drops it."

stateful inspection: "Packet filter that bases its decision to allow
or deny the packet using both the data in the packet and information
(that is, state) saved from previous packets or events.  A stateful
packet filter has memory of past events and packets."

hth

Valerie