wood burning stoves*
The moose likes EJB and other Java EE Technologies and the fly likes What is denial of service attack? Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login


Win a copy of OCA/OCP Java SE 7 Programmer I & II Study Guide this week in the OCPJP forum!
JavaRanch » Java Forums » Java » EJB and other Java EE Technologies
Bookmark "What is denial of service attack?" Watch "What is denial of service attack?" New topic
Author

What is denial of service attack?

Gurumurthy Ramamurthy
Ranch Hand

Joined: Feb 13, 2003
Posts: 272
Hi Guys,

If you know the answer, pls. let me know.

Thanks
Steven Bell
Ranch Hand

Joined: Dec 29, 2004
Posts: 1071
Often called a DNS attack. You basically pound a server with requests until it can't handle any more and is unable to process legitimate requests.
Gurumurthy Ramamurthy
Ranch Hand

Joined: Feb 13, 2003
Posts: 272
ok, if this is the case, what exact we can deduce from the following sentences. This is taken from Mark Cade book about the applet security.

"If an applet could make arbitrary connections to any hosts, then applets could be used as the origin for denial of service attacks against other systems."

Do you mean that if an applet is given permission to connect to any other network, the applet can very easily prove that it did not make an effort to attack some services on the server it connected? (it can deny the attack)

Thanks
Steven Bell
Ranch Hand

Joined: Dec 29, 2004
Posts: 1071
I think the point is that if you had a high traffic web site with an applet on it and that applet constantly sent requests to, for example, MS's web site. You could have a few hundred computers slamming MS's web site.
Gurumurthy Ramamurthy
Ranch Hand

Joined: Feb 13, 2003
Posts: 272
awesome explanation...I got it. Thanks a lot.
Stan James
(instanceof Sidekick)
Ranch Hand

Joined: Jan 29, 2003
Posts: 8791
Steve Gibson at grc.com was a victim of DoS and wrote a wonderful report of how he responded with some pretty amazing reverse hacking. It's worth a browse if you're interested in this kind of thing.

2001 Attack

2002 Attack
[ March 11, 2005: Message edited by: Stan James ]

A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi
Udegbunam Morah
Ranch Hand

Joined: Oct 13, 2002
Posts: 36
Steven, that's a good explanation. Can you give any production environment where such can be experienced?

Thanks.


Udegbunam Ikechukwu Morah<br />B.Sc.,SCJP, MCP, OCP, PMP<br />Manager, Business COnsulting Group<br />Deep Business Solutions Limited
Steven Bell
Ranch Hand

Joined: Dec 29, 2004
Posts: 1071
Well, it actually can't be experienced. Applets are only allowed to send requests to the server the came from. The DNS attack is one of the reasons behind that security policy.

I guess you could set up an applet to DNS yourself.
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: What is denial of service attack?