Novell (NOVL) dirt cheap, good buy? Message Board

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Technology Stocks : Novell (NOVL) dirt cheap, good buy?

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To: Paul Fiondella who wrote (30262)	2/11/2000 3:59:00 PM
From: Richard J. Haynal	Read Replies (2) of 42771

Paul There are basically three ways you can do this. A session can be hi-jacked, a host or server can be compromised, or one can merely craft a packet with source address of network-to-be attacked. The thing about a Denial of Service attack is that it can go after a legitamate service offered at the site and just overwelm it. (i.e. There are applications out on all of the hacker sites which will fire off a continuous stream of packets. This may be in the form of requesting web page (www.novell.com). This is a legitamate request and one does not have to authenicate to anyone to get it. These request can be sent pretty fast. The whole idea is to over burden the site's server/firewall, effectively killing their pipe, server, and firewall. The way to defend against this is to just tell the firewall if you see "X requests within X timeframe" from any one box, block that box. The big attacks this last week have been a new type called "Distributed Denial of Services" attack. All it means is that the souce address now is being changed. So this attack looks like it is coming from many boxes instead of one. The old defense for "Denial of Services" attacks will not catch this.

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