If your ISP provides dynamic IP address service, you can expect your IP address to change each time you reconnect.
Contrary to popular belief, you do not need a static IP address in order to run a server on your own computer. Dynamic DNS services provide a way to give your computer an Internet hostname that does not change, such as example.is-a-geek.com. These services automatically update the IP address that corresponds to your hostname every time your IP address changes. For more information about dynamic DNS services, see my article how do I get a hostname for my own computer?
Got a LiveJournal account? Keep up with the latest articles in this FAQ by adding our syndicated feed to your friends list!