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Re: Bug in TCP/IP stack in 2.2.17? (fwd)

To: astanich@xxxxxxxxxxxxxxxxx (Alexander Stanich)
Subject: Re: Bug in TCP/IP stack in 2.2.17? (fwd)
From: kuznet@xxxxxxxxxxxxx
Date: Fri, 10 Nov 2000 20:49:18 +0300 (MSK)
Cc: patrik@xxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <3A0C2C04.1B720C90@reutershealth.com> from "Alexander Stanich" at Nov 10, 0 12:10:28 pm
Sender: owner-netdev@xxxxxxxxxxx
Hello!

> the firewall happens to be doing the handshaking on all incoming TCP 
> connections, been the victim
> of several TCP/SYN flood attacks. maybe this is where it flakes?  the 
> firewall intercepts the
> client SYN, send the SYN/ACK, waits for the client ACK.  if it gets the ACK 
> it's supposed to open
> up a new connection to the server. 

I heard that such beasts exist, but believed that it is rather joke.
Hmm... not a joke, indeed. Bad joke to be more exact. 8)

Apparently, it tries to relay options received in server's SYN-ACK.
It is too late to drink mineral water, when kidneys dilapidated. 8)8)

Alexey

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