This is very nice and simple.

As you probably know, there are already a few dyndns clients out there, most (all?) of which are listed at https://www.dyndns.org/services/dyndns/clients.html. I like Paul Burry's ddclient (one of a number written in Perl) because it allows me to update the WAN IP my router is picking up.

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Allolex

Perl and Linguistics
http://www.linuxjournal.com/article.php?sid=3394