One solution is a neat service called freemyip.com.Typically, when you connect to the Internet, your ISP assigns an unused
IP address from a pool of IP addresses which may be used only for the duration of that specific
connection or it may change as often as every day. freemyip.comfprovides a method of contacting the DNS service
each time the IP address provided by the ISP changes, and
subsequently updating the DNS database to reflect the
change in IP address so even though your IP address
will change often, other users
do not have to know the changed IP address in order to connect
with your computer.  This allows you to have your own web server, or easily connect
remotely to your network using SSH, among other examples.