•	Make sure your TCP/IP control panel is configured correctly, including the correct IP address, subnet mask, and physical network connection. For instructions, see Mac Help (available in the Help menu on computers with Mac OS 9 installed).
•	Make sure your physical connections (for example, your Ethernet cables) are securely plugged in throughout your network.
•	Use a utility to "ping" your Internet gateway or router. Pinging lets you check whether a network device (such as a router or a computer) is online. You can find out more about ping and other tools on the AppleShare IP Web site: www.apple.com/appleshareip/text/extensions.html
•	Make sure you are connected directly to the Internet using a "gateway" (a device that links local area networks to one another and translates data between different kinds of networks), or you have an account with an Internet service provider (ISP).

Computers outside your network can't connect to your network

•	Make sure you've registered your network with an appropriate Internet organization so that other computers can find your network and the individual computers on it.
•	Make sure you have a Domain Name System (DNS) server on your network, or access to a DNS server through your ISP.
•	When you request a domain name, make sure you are assigned a list of IP addresses that will work in your domain.
•	Assign each of the AppleShare IP servers on your network an IP address in the DNS server database, or make sure your ISP has done so.
•	Once you've established your organization's Internet address information and assigned the individual IP addresses to the computers on your network, set up TCP/IP.