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-former QueSO home page <URL:http://www.apostols.org/projectz/queso/>:
-
-How we can determine the remote OS using simple TCP packets? Well,
-it's easy, they're packets that don't make any sense, so the RFCs
-don't clearly state what to answer in these kind of situations.
-Facing this ambiguous, each TCP/IP stack takes a different approach
-to the problem, and this way, we get a different response. In some
-cases (like Linux, to name one) some programming mistakes make the OS
-detectable.
-
-QueSO sends:
-
- 0 SYN * THIS IS VALID, used to verify LISTEN
- 1 SYN+ACK
- 2 FIN
- 3 FIN+ACK
- 4 SYN+FIN
- 5 PSH
- 6 SYN+XXX+YYY * XXX & YYY are unused TCP flags
-
-All packets have a random seq_num and a 0x0 ack_num.