Nmap
by Fyodor
Platforms: AIX, BSDI, FreeBSD, HP-UX, IRIX, Linux, NetBSD, OpenBSD, Solaris, SunOS, UNIX
Categories: Auditing, Fingerprinting, Network, Network Utilities, Ports
Version: v3.70
URL: http://www.insecure.org/nmap/
Nmap is a utility for port scanning large networks, although it works fine for single hosts. Sometimes you need speed, other times you may need stealth. In some cases, bypassing firewalls may be required. Not to mention the fact that you may want to scan different protocols (UDP, TCP, ICMP, etc.). Nmap supports Vanilla TCP connect() scanning, TCP SYN (half open) scanning, TCP FIN, Xmas, or NULL (stealth) scanning, TCP ftp proxy (bounce attack) scanning, SYN/FIN scanning using IP frag