web servers and routers

[Xenon]

Basically you set you paid domain to forward to your no-ip address, then you get the "little app" or router or whatever to send your IP to the no-ip account. Make sure you have already set-up a sub-domain on the no-ip.com site so the client program knowns what it should change.

http://www.230volts.co.uk/noip.png

Here is a picture of the Windows client for reference.

[judhkqkhsd]

aha!

so you dont use the no-ip address as a DNS server but you simply forward MY-DOMAIN.COM to BLANK.NO-IP.COM and then all of the pages are served from the dynamically updating ip?

is that right?

[Xenon]

Indeed! You have cracked it!
It is basically daisy-chaining some forwarders.

The reason why you use a sub-domain i.e. something.noip.com, is that it can update quickly on their servers so the maximum update time is about 30 minutes but is normally much lower. The higher level domain can take upto 24 hours or so to pass the target IP/address onto the other root servers which would mean a lot of downtime if you had to change that one each time your IP changed.