How can I stop a ddos attack without changing my IP addresses?

9,860 pts.
Tags:
Attacker IP blocking
DDOS
Firewalls
IP blocking
Security in 2010
Windows
Windows Server 2008 R2
Windows Server Security
We have about 10 IP addresses trying to cause a DDOS attack on our organization. As soon as I block the addresses in the firewall another batch takes its place. This has been ongoing for about 10 hours. How can I stop this attack without changing my IP addresses?

Software/Hardware used:
Windows server 2008 r2
ASKED: September 20, 2010  6:10 PM
UPDATED: September 21, 2010  2:54 PM

Answer Wiki

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Changing your IPs probably won’t help. They are probably doing the DDOS against your DNS name so when you change the DNS to the new IP the DDOS will just follow you.

About all you can do is keep blocking IPs that are involved in the DDOS.

Discuss This Question: 4  Replies

 
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  • jinteik
    I think with an IPS it will help against DDOS attack
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  • Stevesz
    I'd check with my ISP to see if they can help alleviate the attack against you.
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  • Karl Gechlik
    [...] 8. Get a few tips from Mr. Denny, Jinteik, and Stevesz on stopping a DDOS attack. [...]
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  • Karl Gechlik
    [...] 1. Mr. Denny, Jinteik, and Stevesz gave some advice on how to stop a DDOS attack without changing IP addresses. [...]
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