From mboxrd@z Thu Jan  1 00:00:00 1970
From: Patrick McHardy <kaber@trash.net>
Subject: Re: Problem accessing https://my.procurve.com/profile/index.aspx
 (ACK is over the upper bound)
Date: Mon, 02 Jul 2007 15:23:13 +0200
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To: Krzysztof Oledzki <ole@ans.pl>
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Krzysztof Oledzki wrote:
> 
> OK, this was easy. The RST was sent simply because the packed was not
> dropped but instead delivered to the local IP - there was no valid tuple
> to change (unnat) the packed destination. Setting:
> 
> iptables -I PREROUTING -m conntrack --ctstate INVALID -j DROP


We should really document that with window tracking and NAT you
must drop INVALID packets to avoid them getting delivered locally
and causing a RST.

> 
> make no more RSTs, only retransmisions from the 216.34.143.7. And yes, I
> have a patched kernel so I'm able to filter packets in a PREROUTING chain.

Dropping works without any patches.