Before you run it you have to configure it by editing configuration file /etc/inadyn.conf which looks like this:
# let it run in background as daemon background # but lets log into log file log_file /var/log/inadyn.log # Check for a new IP every 600 seconds update_period_sec 600 # Enter your DynDNS.com username and password here # your DynDNS.com username username YOURLOGIN # your DynDNS.com password password YOURPASSWORD # What kind of host is being updated? Choices are email@example.com, firstname.lastname@example.org, email@example.com dyndns_system firstname.lastname@example.org # and the domains you need to update # alias examplexxx.dyndns.org alias example1.homeip.net
It think the file is self explained. Basicly you need to edit your username and password and at the bottom the alias domains that you are using. Can be one or many. If you have more then one then just repeat the alias lines and add your domains.
You can eventualy also change the period in which should try to update from default 600 second. Its smart and it will not do the update unless the IP actualy changed. At least thats something it says in manual, but I am unable to test this since I have static IP.
But I did make a test account and some bogus domain. And it sucessfuly updated the IP. This is a nice alternative to myetrayz DDNS since as I read on forum, that domain doesn't get automaticly updated with dynamic IP.