can I prevent DoS (Denial of Service) Attacks in JSP?

2005-08-02 Thread Ben Bookey

Dear List,

I have been asked if its possible to prevent DoS attacks inside Java 
(JSP/Servlet).


I guess it is ... is this something however that TC would be configured to 
deal with, or

must I do something myself. Whats normal ?

Many thanks in advance!
Best wishes
Ben Bookey



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Re: can I prevent DoS (Denial of Service) Attacks in JSP?

2005-08-02 Thread Larry Meadors
Hmm, that is like asking how to avoid automobile accidents.

Larry


On 8/2/05, Ben Bookey [EMAIL PROTECTED] wrote:
 
 Dear List,
 
 I have been asked if its possible to prevent DoS attacks inside Java
 (JSP/Servlet).
 
 I guess it is ... is this something however that TC would be configured to
 deal with, or
 must I do something myself. Whats normal ?
 
 Many thanks in advance!
 Best wishes
 Ben Bookey
 
 
 
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 To unsubscribe, e-mail: [EMAIL PROTECTED]
 For additional commands, e-mail: [EMAIL PROTECTED]
 



Re: can I prevent DoS (Denial of Service) Attacks in JSP?

2005-08-02 Thread Edmund Urbani

Larry Meadors wrote:


Hmm, that is like asking how to avoid automobile accidents.

Larry


On 8/2/05, Ben Bookey [EMAIL PROTECTED] wrote:
 


Dear List,

I have been asked if its possible to prevent DoS attacks inside Java
(JSP/Servlet).

I guess it is ... is this something however that TC would be configured to
deal with, or
must I do something myself. Whats normal ?

Many thanks in advance!
Best wishes
Ben Bookey

   

i guess one could attempt to write a filter that rejects requests that 
*look like* they are part of a DoS attack, but there's always the risk 
of eliminating legitimate traffic with this. and it probably won't help 
at all if the attacker found a weak spot specific to your web application.


Edmund

BTW don't forget to fasten your seatbelt.

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Re: can I prevent DoS (Denial of Service) Attacks in JSP?

2005-08-02 Thread MC Moisei
I don't is possible because in case of a DoS they first target your web 
server by making it busy.

That can be tomcat but can well be apache.

Secondly they can attack you from many ip addresses and that would be 
pretty harsh, if for example you'd get 1 zillion requests for a larger 
file/page and your tomcat will become very busy trying to serve that 
page/file.Additional users will experience slow access or even no access at 
all.


What you can do, is more like a prevention - just an idea, never implemented 
yet - keep tap of access and if you think that one particular ip address or 
one resource is hit extremely often then treat that request differenly, a 
short(text), polite message will do - you'd serve it differently.
This will not be bullet proof thought, any additional number of requests can 
bring you bag at start point...


Maybe load balancing can help, that has nothing to do though with your 
application. It's a appserver and hardware configuration.


Hope this will help,
MC
http://www.goodstockimages.com




From: Larry Meadors [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
To: Tomcat Users List tomcat-user@jakarta.apache.org
Subject: Re: can I prevent DoS (Denial of Service) Attacks in JSP?
Date: Tue, 2 Aug 2005 08:30:32 -0600

Hmm, that is like asking how to avoid automobile accidents.

Larry


On 8/2/05, Ben Bookey [EMAIL PROTECTED] wrote:

 Dear List,

 I have been asked if its possible to prevent DoS attacks inside Java
 (JSP/Servlet).

 I guess it is ... is this something however that TC would be configured 
to

 deal with, or
 must I do something myself. Whats normal ?

 Many thanks in advance!
 Best wishes
 Ben Bookey



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 To unsubscribe, e-mail: [EMAIL PROTECTED]
 For additional commands, e-mail: [EMAIL PROTECTED]






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