OpenBSD: Install nmap Network Port Scanner Security Tool

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

Tutorial details
DifficultyEasy (rss)
Root privilegesYes
RequirementsOpenBSD
TimeN/A
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:

Fig.01: Sample nmap output

Fig.01: Sample nmap output

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.

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