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limit number of HTTP requests on IIS 6.0

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Jenny

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Oct 3, 2007, 1:01:01 PM10/3/07
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Is there a way I can limit the number of HTTP requests based on IP addresses
on IIS 6.0? Our system experienced a "denial of service" attack due to faulty
configuration on the requesting side, within 30 minutes there were about
25000 HTTP requests to our system. I am hoping to find a way to prevent it
from happening again, basically something that says limit the number of HTTP
requests from the same IP address to N requests per minute. Any help is
appreciated. Thanks in advance.

WenYuan Wang [MSFT]

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Oct 4, 2007, 5:55:28 AM10/4/07
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Hello Jenny,

According to your description, what you need is to limiting requests per
client IP. If I misunderstood anything here, please correct me.

DOS attack is a common issue in IIS world. In general, what we need is to
add an extra layer of defense between the internet and web server (For
example: ISA has such DOS protection built in).

Another option: because limiting feature is not included in IIS, we have
to do this in our code. You may have a look at the following document.
http://msmvps.com/blogs/omar/archive/2007/03/24/prevent-denial-of-service-do
s-attacks-in-your-web-application.aspx
[Prevent Denial of Service (DOS) attacks in your web application]

Hope this helps. Please let me know if you have any more concern or there
is anything unclear. It's my pleasure to assist you.

Have a great day,
Best regards,

Wen Yuan
Microsoft Online Community Support
==================================================
This posting is provided "AS IS" with no warranties, and confers no rights.

WenYuan Wang [MSFT]

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Oct 8, 2007, 7:39:59 AM10/8/07
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Hello Jenny,

This is Wen Yuan again. I haven't heard from you a couple of days.
I just want to check if there is anything we can help with.
If you have any more concern or there is anything unclear , please feel
free to update here again. It's my pleasure to assist you.

Have a great day,
Best regards,

Wen Yuan
Microsoft Online Partner Support

Jenny

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Oct 11, 2007, 4:39:04 PM10/11/07
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Wen Yuan,

Thanks for your help, I don't have further questions at this time.

Regards,
Jenny

WenYuan Wang [MSFT]

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Oct 11, 2007, 10:40:07 PM10/11/07
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You are welcome, Jenny.:)
I'm standing by.
If you need further assistance on this issue, feel free to update here
again.

Have a great day,
Best regards,

Wen Yuan
Microsoft Online Community Support

Meister

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May 12, 2008, 6:59:00 PM5/12/08
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Hi Wen,

Do you have solution for old ASP pages?

Meister

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