URGENT: Need to block x_forwarded_for IP at server level

From: Raven (ravenNOSPAM_at_NOSPAMravenphpscripts.com)
Date: 03/29/05 

Date: Tue, 29 Mar 2005 20:42:36 GMT

As I write this, I am under a severe dDos attack. Tens of hundreds of
proxies and forged IP's, but the x_forwarded_for IP is always the same. Is
there any way, using IPTABLES, to block an IP, preferably an IP range, using
the x_forwarded_for IP?

TIA!