Nmap (Network Mapper) is an open source tool for network exploration and security auditing. It was designed to rapidly scan large networks, although it works fine against single hosts.
export PKG_PATH=http://mirror.esc7.net/pub/OpenBSD/`uname -r`/packages/`machine -a`/
Type the following pkg_add command to install nmap tool. The -v flag was used to give a more verbose output. This option is not needed but it is helpful for debugging and was used here to give a little more insight into what pkg_add is actually doing under OpenBSD:
# pkg_add -v nmap
To find out nmap version, enter:
# nmap --version
Nmap version 6.01 ( http://nmap.org ) Platform: i386-unknown-openbsd5.2 Compiled with: liblua-5.1.5 openssl-1.0.0f libpcre-8.30 libpcap-(OpenBSD libpcap) nmap-libdnet-1.12 ipv6 Compiled without:
To scan a host or an IP address, enter:
# nmap -A -v 192.168.1.1
# nmap -A -v server1.cyberciti.biz
# nmap server1.cyberciti.biz
See top 30 nmap command examples that introduce a user to the nmap command line tool to scan a host and/or network, so to find out the possible vulnerable points in the hosts. You will also learn how to use Nmap for offensive and defensive purposes.