Can ddos attacks be stopped?

If a site were to be attacked by ddos could it be prevented, what methods
are available? Would down time after an attack effect engine listings?

Phil wrote:

If a site were to be attacked by ddos could it be prevented, what methods
are available? Would down time after an attack effect engine listings?

You won't have a lot of luck getting answers to security questions
if you ask them in a group that is about search engines.

Phil wrote:

If a site were to be attacked by ddos could it be prevented

OT:

Short answer: not completely. The only way to stop Internet traffic
reaching you is to stop it being generated or filter it somewhere
between your server and the attackers. Because DDOS (as opposed to DOS)
attacks are distributed you have a lot of attackers so a big nasty
complicated problem.

Certain IP level DDOS attacks such as Syn Flooding have been mitigated
by changes to the operating system network layers.

Some firewalls can identify certain DDOS attacks at the network level in
"real-time" and automagically blacklist the IPs which can mitigate the
attack. At least you won't resources consumed on your servers but there
will still be connection requests that your firewall will have to
analyse and drop at the IP or TCP/UDP layer of the Internet network
stack. That will consume resources and use bandwidth which should be
available to your client.

As Guy mentioned above, best look to another n.g. for specific answers
but be prepared to give details of the attacks you have in mind.



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http://www.abcseo.com/

"Phil" <user (AT) btinternet (DOT) com> wrote:

If a site were to be attacked by ddos could it be prevented, what
methods are available?

Look into intrusion detection, which is used to determine whether an
attack is in progress. Some attacks can be prevented if you (or
whoever hosts your site) applies diligence in refusing connections
from known attack sites, attack patterns, etc.

Would down time after an attack effect engine listings?

It can, if the engine can't crawl you, and their ability to do so
influences your ranking and/or listing. For that matter, during the
ddos attack, the engines may not be able to crawl you.

Yet another way that fraud can be perpretated.

--gregbo
gds at best dot com

Phil wrote:

If a site were to be attacked by ddos could it be prevented, what methods
are available? Would down time after an attack effect engine listings?

Good analysis of a DDOS:

http://www.grc.com/dos/drdos.htm

Regards,
Brent

On Mon, 11 Apr 2005 12:24:26 +0000 (UTC), "Phil" <user (AT) btinternet (DOT) com>
wrote:

If a site were to be attacked by ddos could it be prevented, what methods
are available? Would down time after an attack effect engine listings?

If the spider came calling in that time and found the site down, yes,
that could very easily have an adverse effect on rankings.

BB

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www.kruse.co.uk/ seo (AT) kruse (DOT) demon.co.uk
seo that loves a cuddle...
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