SYN Floods

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I have a host behind a routed firewall (not a NAT situation) that is being
flooded by randomly spoofed/distributed SYN Flooding.  There are
approximately 8-12 pages of SYN_RECV connections, and it effectively slows
down the webserver.

Is there any software that I can sit on my firewall or on the same host that
will "fake" the SYN/SYN+ACK/ACK handshake, and if a valid SYN, pass it along
to Apache?  I need to keep Apache from slowing down.

Both systems are running kernel 2.4.9-31 and have tcp_syncookies enabled,
and timeouts reduced to a minimum.

Thanks,
Jim

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