You might wanna checkout the PerlMonks Snippet Index, I found these there
Re: Getting the latest IP after dial-up
How do I find out my hostname/domainname/IP address?

Getting your real external ip from an external source.
Get actual IP over NAT
Finding your IP address with Perl

In reply to Re: Getting own ip-addresses! by Anonymous Monk
in thread Getting own ip-addresses on Win32 machines by esskar

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