root@server:/etc# nmap 192.168.0.56 -F

Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2008-02-07 18:48 MSK
Interesting ports on 192.168.0.56:
Not shown: 1223 closed ports
PORT     STATE SERVICE
7/tcp    open  echo
9/tcp    open  discard
13/tcp   open  daytime
17/tcp   open  qotd
19/tcp   open  chargen
21/tcp   open  ftp
25/tcp   open  smtp
80/tcp   open  http
135/tcp  open  msrpc
139/tcp  open  netbios-ssn
443/tcp  open  https
445/tcp  open  microsoft-ds
1025/tcp open  NFS-or-IIS
1027/tcp open  IIS
1110/tcp open  nfsd-status
2105/tcp open  eklogin
MAC Address: 00:13:64:33:BD:44 (Paradigm Technology.)

Nmap finished: 1 IP address (1 host up) scanned in 29.899 seconds