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Re: Help to defend from DOS web attacks
From: "Breno Brand Fernandes" <breno () lagosnet com br>
Date: Fri, 26 Oct 2007 14:55:06 -0200

Hi Emanuel,
You can't block the attackers IPs, because they often use random sources. So, you should limit the packets which use SYN flag activeted, and use some protection like syn cookie that dont let the attack allocate so memory in your gateway.

Att,
Breno Brand Fernandes

----- Original Message ----- From: "Emanuel Marufo" <marufos () gmail com>
To: <security-basics () securityfocus com>
Sent: Thursday, October 25, 2007 11:41 PM
Subject: Help to defend from DOS web attacks


Hello,

Recently somebody attack my web server, and i thinking defend from that.

I readed the next article:
http://www.quadrunner.com/index.php?option=com_content&task=view&id=151&Itemid=2

but i want to know if can config a snort/portsentry to block attackers ip's.


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