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ipfw: Stealth Mode connection attempt to?

Subject: ipfw: Stealth Mode connection attempt to?
From: Stephane Sudre <email@hidden>
Date: Mon, 13 Mar 2006 11:52:47 +0100
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I had a quick look at the source code (tcp_input.c) and it looks like that "Stealth Mode connection attempt to TCP" is reported when the SYN flag is on but no TCB exits.

Does this mean that if you receive a ACK|SYN answer from a remove server to a SYN packet but, by some kind of unknown magic, the TCB is NULL, this is considered a Stealth mode connection?

BTW, there is probably a typo at the end of line 1160

"* a wakeup to the process connected to our socket). We can reasonable"

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