root@powerslave:~# nmap -sS -O -P0 -v -v irc.khelben.co.uk

Starting nmap 3.81 ( http://www.insecure.org/nmap/ ) at 2006-12-11 03:25 CET
Initiating SYN Stealth Scan against irc.khelben.co.uk (82.69.182.60) [1663 ports] at 03:25
SYN Stealth Scan Timing: About 10.28% done; ETC: 03:30 (0:04:21 remaining)
The SYN Stealth Scan took 144.33s to scan 1663 total ports.
Warning:  OS detection will be MUCH less reliable because we did not find at least 1 open and 1 closed TCP port
Host irc.khelben.co.uk (82.69.182.60) appears to be up ... good.
All 1663 scanned ports on irc.khelben.co.uk (82.69.182.60) are: filtered
Too many fingerprints match this host to give specific OS details
TCP/IP fingerprint:
SInfo(V=3.81%P=i386-portbld-freebsd5.3%D=12/11%Tm=457CC23D%O=-1%C=-1)
T5(Resp=N)
T6(Resp=N)
T7(Resp=N)
PU(Resp=N)

Nmap finished: 1 IP address (1 host up) scanned in 160.318 seconds
               Raw packets sent: 3343 (134KB) | Rcvd: 1 (74B)