How do I install nmap network security and auditing tool under OpenBSD operating system?


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.

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Installation

Use pkg_add command to install software package called nmap under OpenBSD operating system. First, you must set the PKG_PATH environment variable as follows:

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
Sample outputs:

nmap-6.01: ok

Examples

To find out nmap version, enter:
# nmap --version
Sample outputs:

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
OR
# nmap -A -v server1.cyberciti.biz
OR
# nmap server1.cyberciti.biz
Sample outputs:

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.