This post originated from an RSS feed registered with .NET Buzz by Paschal. Original Post: Somebody has an idea to block SYN flood attack ?? Feed Title: help.net Feed URL: http://www.asp.net/err404.htm?aspxerrorpath=/pleloup/Rss.aspx Feed Description: .Net for mankind ! Latest .NET Buzz Posts Latest .NET Buzz Posts by Paschal Latest Posts From help.net

I am really angry against the blokes who launched a SYN flood attack on one of my servers three weeks ago.

The problem is this continue again and again. I am so tired and fed up to play cat and mouse with spoof IPs.

The firewall resist well, blocking the attack and sending me back an alert by email.

But sadly, I can't make the site performing at his best. It seems that blocking is not enough, and the site is so slooow when the attacker come back.

I am turning now to the community to see if by any chance, somebody has some ideas and a solution.

I  also changed the pool settings in IIS 6 to recycle the worker process with some conditions like CPU usage, but it's not really successful.

The last thing to do will be surely to use a new IP and burn the old one.