[en] Port scanning, again

I scanned a friend's machine a week ago.
nessus_tcp_scanner took 380 s, "nmap -T aggressive" took more than 1500 s.

[update 2005-07-27]
Nmap looks badly broken in some cases, but I was unable to reproduce that as the configuration of the target machine was changed since.
Meanwhile, I broke nessus_tcp_scanner...