compu:/home/igor# nmap -O 192.168.2.251

Starting Nmap 4.20 ( http://insecure.org ) at 2007-04-21 21:01 COT
Interesting ports on 192.168.2.251:
Not shown: 1694 closed ports
PORT    STATE SERVICE
135/tcp open  msrpc
139/tcp open  netbios-ssn
445/tcp open  microsoft-ds
MAC Address: 00:16:6F:4C:30:2E (Intel)
No exact OS matches for host (If you know what OS is running on it, see http://insecure.org/nmap/submit/ ).
TCP/IP fingerprint:
OS:SCAN(V=4.20%D=4/21%OT=135%CT=1%CU=34491%PV=Y%DS=1%G=Y%M=00166F%TM=462AC2
OS:22%P=x86_64-unknown-linux-gnu)SEQ(SP=F9%GCD=1%ISR=10C%TI=I%II=I%SS=S%TS=
OS:0)OPS(O1=M5B4NW0NNT00NNS%O2=M5B4NW0NNT00NNS%O3=M5B4NW0NNT00%O4=M5B4NW0NN
OS:T00NNS%O5=M5B4NW0NNT00NNS%O6=M5B4NNT00NNS)WIN(W1=4470%W2=41A0%W3=4100%W4
OS:=40E8%W5=40E8%W6=402E)ECN(R=Y%DF=Y%T=80%W=4470%O=M5B4NW0NNS%CC=N%Q=)T1(R
OS:=Y%DF=Y%T=80%S=O%A=S+%F=AS%RD=0%Q=)T2(R=Y%DF=N%T=80%W=0%S=Z%A=S%F=AR%O=%
OS:RD=0%Q=)T3(R=Y%DF=Y%T=80%W=402E%S=O%A=S+%F=AS%O=M5B4NW0NNT00NNS%RD=0%Q=)
OS:T4(R=Y%DF=N%T=80%W=0%S=A%A=O%F=R%O=%RD=0%Q=)T5(R=Y%DF=N%T=80%W=0%S=Z%A=S
OS:+%F=AR%O=%RD=0%Q=)T6(R=Y%DF=N%T=80%W=0%S=A%A=O%F=R%O=%RD=0%Q=)T7(R=Y%DF=
OS:N%T=80%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=)U1(R=Y%DF=N%T=80%TOS=0%IPL=B0%UN=0%R
OS:IPL=G%RID=G%RIPCK=G%RUCK=G%RUL=G%RUD=G)IE(R=Y%DFI=S%T=80%TOSI=Z%CD=Z%SI=
OS:S%DLI=S)


Network Distance: 1 hop

OS detection performed. Please report any incorrect results at http://insecure.org/nmap/submit/ .
Nmap finished: 1 IP address (1 host up) scanned in 21.938 seconds