Security Basics mailing list archives
RE: Preveting DDOS Syn floods on HTTP servers
From: "Aditya, ALD [Aditya Lalit Deshmukh]" <aditya.deshmukh () online gateway technolabs net>
Date: Wed, 10 Mar 2004 10:47:46 +0530
I was wondering if it was possible for a HTTP servers to prevent DDOS syn floods, attacks from different IP's, like a attack from a IRC network or something like that.
if you are using linux look into tcp_syncookies, a word of caution : it requires a lot of physical memory and this allocated memory is non swappable. increasing the value by a small bit would cause quite a bit of increase in memory requirments but your server would be able to handle syn floods more efficiently. HTTP server cannot be hardened because syn scans are to be blocked by the os : so harden your OS -aditya ________________________________________________________________________ Delivered using the Free Personal Edition of Mailtraq (www.mailtraq.com) --------------------------------------------------------------------------- Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off any course! All of our class sizes are guaranteed to be 10 students or less to facilitate one-on-one interaction with one of our expert instructors. Attend a course taught by an expert instructor with years of in-the-field pen testing experience in our state of the art hacking lab. Master the skills of an Ethical Hacker to better assess the security of your organization. Visit us at: http://www.infosecinstitute.com/courses/ethical_hacking_training.html ----------------------------------------------------------------------------
Current thread:
- Preveting DDOS Syn floods on HTTP servers nabi1 (Mar 08)
- RE: Preveting DDOS Syn floods on HTTP servers Shaun Sturby, MCSE Optrics Engineering (Mar 08)
- Re: Preveting DDOS Syn floods on HTTP servers jamesworld (Mar 09)
- RE: Preveting DDOS Syn floods on HTTP servers Aditya, ALD [Aditya Lalit Deshmukh] (Mar 10)
- Re: Preveting DDOS Syn floods on HTTP servers Fernando Gont (Mar 17)
- <Possible follow-ups>
- RE: Preveting DDOS Syn floods on HTTP servers MARTIN M. Bénoni (Mar 09)
- RE: Preveting DDOS Syn floods on HTTP servers Fernando Gont (Mar 17)