рабочий lytdybr

# time nmap -v -sS -O -T Paranoid -p 1-65535 x.x.x.1/24

Starting nmap 3.25 ( www.insecure.org/nmap/ ) at 2004-11-17 17:21 MSK

Host x.x.x.0 seems to be a subnet broadcast address (returned 1 extra pings).
  Still scanning it due to ping response from its own IP.
Initiating SYN Stealth Scan against x.x.x.0 at 18:13