You just need a dynamic DNS service, and there are none better in this reviewer's opinion than TZO.

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TZO Support faq for category: update-clients


What is an Update Client used for?
Do I need an Update Client?
Should I use a downloadable TZO client, or one built into my router/DVR/NAS device etc?
Linksys Camera - 'UPDATE NOW' Button Causes an Error
Can I use TZO without installing any software client?
Can I customize the HTML that the TZO webserver displays?
Why did the perl client give me an internal LAN IP address?
The TZO Perl client does not support my OS; workarounds?
Can I run the TZO Server and another webserver (IIS or Apache) at the same time?
What do the different color TZO icons indicate?
Does the GNOME based Linux client run under KDE?
How do I force an IP address update in the TZO Perl Client?
How do I fix the "gnomeConf.sh file in /usr/lib... not found" error?