Question

HTTP Flood attack, low bandwidth

Asked by: Lionelie

Hello,

My server is currently being attacked by HTTP flood attack. It comes from distribution of spoofed IPs. My X-Peak Watchguard was doing well but the problem is the attacked had consumed a lot of bandwidth and still my website becomes inaccessible. I have subscribed for only 30MB instead the attacked was consumed in range of 100MB-150MB.

My question is :-

1. Since the ISP can't do anything to help me for at least route bad traffic to the blackhole, if there any hardware could block SYN attack and in the same time save my bandwidth instead of preventing from upstream provider?

2. I'm thinking to try using the Ddos mitigation services that provide proxy IP. Which one has provided competitive prices & good support instead of Prolexic (this one is absolutely under my budget)? Provider from East Asia region is much preferred.

Thanks for GOOD answers.

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Asked On
2009-04-18 at 21:42:53ID24335076
Tags

problem

Topics

tHttpd Web Server

,

Internet Service Providers (ISP)

Participating Experts
3
Points
500
Comments
3

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Answers

 

by: The_KingPosted on 2009-04-19 at 10:25:56ID: 24179814

you can try toughening up your TCP/IP stack as described in the following link
http://msdn.microsoft.com/en-us/library/aa302363.aspx

and there is some more good info here
http://www.tcpiq.com/tcpIQ/DenialOfServiceAttack/


sorry I couldnt help more hope you succeed

 

by: setasoujiroPosted on 2011-05-07 at 11:47:30ID: 35713100

normally the wg should autoblok syn flood generating IPs, if it really fails i would advise riorey

 

by: xcomiiiPosted on 2011-09-15 at 10:06:37ID: 36544369

I have good experiences with Junipers SSG series when internal servers are flooded. Even the small SSG5 is good enough if you only have 30 Mb connection.

However, a serious and normal ISP would take this incident and help you with this. And the spoofed IP addresses, are they in the private IP range or public? Anyway, a good designed and configured ISP network, should block spoofed IP address in their routers, killing unwanted traffic as early as possible. In worst case, you have to change your IP address.

20120131-EE-VQP-002

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