If you can access some, but not all, services over TCP, see the Help for the service you can't access.

If you can't access any services over TCP from any client computer:

•	Check the settings in the server's TCP control panel. Make sure the IP address, subnet mask, router address, and Configure settings match those given to you by your network administrator. You can also check TCP settings by trying to connect to your Web site with a Web browser. If you can, TCP settings are correct.
•	If the TCP settings appear to be correct:
	• Make sure Ethernet is working by checking the status lights on your Ethernet hub or switch. • Check to be sure routers are working by using software that can "ping" network devices. 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
•	If you have turned on TCP filtering using the TCP Filter Admin application but have not added any additional filters, all access to your server is denied by default. You need to do one of the following:
	• Turn off TCP filtering. • Add new filters to your filter list that allow access to computers that have the IP addresses you specify.

If only a few client computers can't access the server over TCP:

•	Check the settings in the client computer's TCP/IP control panel. Make sure the IP address, subnet mask, router address, and Configure settings match those given to you by your network administrator.
•	Make sure Ethernet is working by checking the status lights on the Ethernet hub or switch to which the client computer is connected.