Speeding Your Scans -- Firewalled Hosts A newer version improves upon this: # ./nmap -P0 www.insecure.org Starting nmap 3.15BETA3 ( www.insecure.org/nmap/ ) at 2003-03-16 13:05 PST Interesting ports on www.insecure.org (64.71.184.53): (The 1605 ports scanned but not shown below are in state: filtered) Port State Service 22/tcp open ssh 25/tcp open smtp 53/tcp open domain 80/tcp open http 113/tcp closed auth 8080/tcp closed http-proxy Nmap run completed -- 1 IP address (1 host up) scanned in 228.477 seconds