Since Metasploit is so dynamic and still changing frequently with full time employees, it is best to just sync a local file tree to the latest code branch when you plan to use it. You can use the /usr/ports/security/metasploit port, but you will find it lagged far behind the latest SVN tree.

Anyways, we need to install subversion to download the Metasploit Framework.

1. # cd /usr/ports/devel/subversion
2. # make install clean distclean

Now make room for Metasploit and download the tree.

1. $ mkdir ~/.msf3
2. $ cd ~/.msf3
3. $ svn co https://www.metasploit.com/svn/framework3/trunk framework

Finally, drag in Ruby and a few supporting modules.

1. # cd /usr/ports/databases/rubygem-activerecord
2. # make install clean distclean
3. # cd /usr/ports/devel/ruby-rreadline
4. # make install

Also, if you want to interface Metaspoit with a database backend (and you will), just install database server of choice (MySQL, Postgres, Sqlite3) and supporting Ruby module.

1. # cd /usr/ports/databases/mysql51-server
2. # make install clean distclean
3. # cd /usr/ports/databases/ruby-mysql
4. # make install

1. # cd /usr/ports/databases/sqlite
2. # make install clean distclean
3. # cd /usr/ports/databases/rubygem-sqlite3
4. # make install

If you want to use the Web interface, you will have to install yet another Ruby module.

1. # cd /usr/ports/www/rubygem-rails
2. # make install clean distclean