In most cases, the ExpressXL, or the router the ExpressXL is plugged into, will be connected to the Internet via a dynamic public IP address. This means the IP address changes and without knowing what the IP address is, one cannot browse directly to the ExpressXL. A great workaround for this problem is dynamic DNS (DDNS), in this case provided by TZO.com.
Enable this option if you want the TZO client to run.
Enter the hostname you selected when signing up for TZO.
Enter the email you selected when signing up for TZO.
Enter the key TZO emails after signing up.