TODO.txt

[ ] setup web server on dyndns server serving page for dyndns client get their public IP; example: http://najib.dyndns.magnifix.com.my/whatismyip/
[/] if multiple host with same client; just get public ip once from whatismyip.org.
[/] if multiple need update for multiple host to same server, and if using the same 'key', do just update all in one run (one config file / run nsupdate only once).
[ ] untidy the code/script
[ ] write proper documentation on setting up the DNS server for accept dynamic update request.
[ ] write proper documentation on setting up the client.
[ ] generate tar.gz package
[/] share at git hosting service (example: github.com)