TCP ACK/RST packets with data in the Reset Cause

[Mike Gibson <micheal.gibson () gmail com>]

Has anyone ever seen TCP RST packets being sent from clients to web
server with a "Reset Cause" containing the HTML that was in the packet
that they are responding to?

For example a browser client is getting a 404 error returned from my
webserver but right after this I am seeing a CP ACK/RST packet from
the client with the 404 HTML in the packet.

When I look at the packet in Ethereal it shows the HTML in a field
called "Reset cause".

These packets are causing my IDS to go nuts.

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