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Use htaccess to block specific router names rather than IP Blocks

My website has been under attack for a couple of weeks now. I have a dedicated server. I started by blocking their IP addresses, but they just keep changing them over and over and over. Basically I want to block the router most of the IP's resolve too:

adsl-XX-XX-XX-X.dsl.lsan03.sbcglobal.net

How do I block all ip's coming from dsl.lsan03.sbcglobal.net? What would the proper syntax be in the htaccess, or how could I add this to csf.deny?

Any help would be greatly appreciated.

-S
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summerset
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summerset
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arnoldCommented:
There is no syntax that you can  use to block traffic through which a packet might travel.

Your best might be to use iptables/snort to setup an IDS/IPS that will reject the requests.

There  are apache based tools as well to shield the server to some extent.
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summersetAuthor Commented:
Thanks...Could you elaborate on the tools
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arnoldCommented:
iptables/snort can be setup as IDS/IPS system. where they will shield apache from different types of connection.

Apache also has retelimit, etc. but every measure you make has an impact since they are resource consumers on the server.
One optoin is to block the IP segments on the firewall.
Intenet Firewall IDS/IPS server_lan

The issue is that implementing different things is not cheap and the decision is up to you to see whether it is worth while.
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