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Block access to my servers from a domain
Hi, I have a question.
Exist a domain (domain.fm), this domain receives constant DDoS attacks and the webmaster of domain.fm has pointed the domain to my server and the DDOS attack has been redirected to me.
Is it possible to block this domain?
I noticed that the webmaster of domain.fm only points the domain to
my server when attacked.
Yesterday my apache has been down for several hours.
I would like to block access to my servers from the domain domain.fm
I don't think so. If your server has multiple IP addresses you should be able to have your data center block traffic to the IP this resolves to.
Yes, my server have multiple ips, but this domain pointed to my Main IP.
The HTTP DDOS attack not collapse my server but saturates my apache.
You can install a good firewall that does both egress and ingress filtering for your server. You can try apf along with bfd from
http://www.rfxn.com/?page_id=6. It will prevent you from the the DDOS attack from any host.
You could use iptables string match such as:
as the packets must contain the domain name, this should at least protect your apache and reduce the load on the server.
iptables -A INPUT -m string --algo bm --string "domain.fm" -j DROP
You can also used the csf iptables based firewall to block the IPs under ddos attack.
I will try with this.
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