This is a quick and dirty Perl script to compute the ISP of a given IP, using a Maxmind CSV file
Try first Perl6 stable release.
Install and use CPAN packages on an host without Internet access. On conquering hosts with a camel.
About installing Perl in hostile environments.
How to use and configure properly a CPAN client.
Instructions to get a Perl test suite that checks everything is ok in your home dir.
I am going to put here all the steps required to install DBD::Oracle CPAN module, which is not a straightforward installation. The purpose is to reduce headache and turn it into a repeatable process.
Quick introduction and usage of Devel::Cover to get code coverage metrics for Perl