thanks for your help and explanation.
but why do people do this? Do they make
money doing this?
Scott
-----Original Message-----
From: Scott Perry [mailto:[EMAIL PROTECTED]]
Sent: Thursday, April 12, 2001 12:31 PM
To: [EMAIL PROTECTED]
Subject: RE: [IMail Forum] [Imail forum] denial of service
> what is denial of service attack?
A Denial of Service attack (DoS or DOS) is any type of Internet attack that
is designed to prevent people from using your server(s). There are lots and
lots of types of DoS attacks.
A few years back, we were hit with a ping flood. They just sent tons of
ping packets to us. Since their "pipe" was bigger than ours, it used up all
our bandwidth, and our customers couldn't get through to our servers.
A SYN flood is another type of attack, where hackers send a handful of "half
open" connections that eat up the resources so people can't get through to a
specific port on a specific server.
Then, there's the simply "crash and burn" where a hacker will take advantage
of a known flaw that will crash the software on the server.
Finally, there's DDoS, or Distributed Denial of Service, where a hacker will
hijack a number of servers on the Internet (dozens or hundreds), and set up
software to attack a specific site at a specific time. That's typically
used again larger sites, such as Yahoo, that have high bandwidth and a lot
of protection against attacks. They might be able to easily sustain the
worst possible attack from one or two people, but when 100 different servers
start attack, it gets bad.
--
-Scott
Declude: Anti-virus and Anti-spam solutions for IMail.
http://www.declude.com
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