The same thing that stops people from getting access to your domain registration and changing the IP. You have a contract with your provider (ISP or DNS) which says that you own that IP/Hostname.
Your home IP address changes, but most business or commercial accounts are given a static IP address (or blocks of IP addresses) which never changes.
Yeah, I used it until they rolled it into the business accounts (which I upgraded to in order to dodge data caps and have a symmetrical connection, because bittorrent).
The same thing that stops people from getting access to your domain registration and changing the IP. You have a contract with your provider (ISP or DNS) which says that you own that IP/Hostname.
Your home IP address changes, but most business or commercial accounts are given a static IP address (or blocks of IP addresses) which never changes.
Comcast used to offer this for an extra $10/month to residential customers. Not anymore.
Yeah, I used it until they rolled it into the business accounts (which I upgraded to in order to dodge data caps and have a symmetrical connection, because bittorrent).