On Wednesday 30 October 2002 2:08 pm, Didier Hung Wan Luk wrote: > hello all,=0D > =0D > what do the difficulty numbers mean is higher better or worse??=0D > =0D > Difficulty=3D2463109 (Good luck!) ?? what does this mean?=0D This is a netfilter mailing list, not nmap. However, from the nmap man page: Another test enabled by -O is TCP Sequence Pre=AD dictability Classification. This is a measure that describes approximately how hard it is to establish a forged TCP connection against the remote host. This is useful for exploiting source-IP based trust relationships (rlogin, firewall filters, etc) or for hiding the source of an attack. The actual difficulty number is based on statistical sampling and may fluctuate. It is generally better to use the English classification such as "worthy chal=AD lenge" or "trivial joke". This is only reported in normal output with -v. Antony. --=20 Software development can be quick, high-quality, or low-cost. The customer gets to pick any two out of three.