Cable modem, DSL

	Use TZO with a cable modem, DSL or ISDN connection

•	The growth in the number of cable modem and DSL connections has been enormous. In spite of the demise of some DSL providers, the number of connections continues to increase. Not only do these connections offer faster access to information on the web, the greater bandwidth allows many Internet users to become providers of information as well as information consumers. But if you've tried running a server which is on a dynamic IP address you're aware of the primary problem. For an explanation see "The Problem with Dynamic IP Addresses". But TZO is the solution.

•	When you use Standard TZO you choose a sub-domain name called a TZO name. One example of a sub-domain name is MARS.TZO.COM. If you have a web site www.MARS.TZO.COM someone visits your web site by typing your sub-domain name into their browser. That request comes to TZO and TZO matches your sub-domain name with your current IP address and makes the connection. If you have your own domain name, for example YOURNAME.COM, you'd use the Premier TZO service. Because TZO makes it easier for others to connect to your computer it's now easy for you to host a variety of different applications from your computer at your own site. Some of these include: a web site, an email system, an FTP server a videoconference like Netmeeting or CU-SeeMe, an Internet phone call like Net2Phone or Internet Phone, a remote control application, such as PCAnywhere or Laplink, a multi-user Internet game like Quake III or Half-Life, virtually any TCP/IP enabled software/service

•	But sometimes just making the connection is not enough. Unlike some other dynamic DNS providers, our TZO service can still make the connection for you if your server is behind a router, firewall, or proxy. The TZO service will detect the Internet IP address of the router. If you have control over the router, proxy, or firewall and can allow access to your server through certain ports, then TZO will function properly and resolve your domain name to the IP address of the router, proxy, or firewall.

•	Other times the port through which you'd expect to receive requests is unavailable for your use. For example, web requests are commonly routed through port 80, and if port 80 is unavailable it's difficult to host a web site. TZO solves this problem as well through the HTTP relay service that can relay requests to any port(s) you choose.

•	Please be aware that the service agreement with some cable modem and DSL service providers requires that you not host commercial applications at your site. We do not encourage or suggest that you violate your agreement with your service provider. If your ISP doesn't prohibit you from running a host application, some of the TZO services will help you accomplish it.