Connecting to Campus Hosts Using Telnet

1. What Are Campus Hosts?
2. About Campus Hosts
3. Pre-Configured Connections to Hosts
4. Connecting to Other Hosts via Telnet
   1. Using dataComet for Macintosh
   2. Using TCP3270 for Windows
5. Adding Your Own Hosts to the Bear Access menu
   1. Create a dataComet document for Macintosh
   2. Create a TCP3270 session profile for Windows

What Are Campus Hosts?

About Campus Hosts

Pre-Configured Connections to Hosts

GAEA (CISER)

An IBM UNIX system for research sponsored by Cornell Institute for Social and Economic Research.

INSTRUCT3

A Sun UNIX system used for instructional purposes. Students taking courses that require accounts on this system will receive accounts through their instructors.

CORNELLC

A system used mainly for administrative data processing.

Connecting to Other Hosts via Telnet

Telnet

Telnet is a set of protocols that defines how computers communicate with host systems. TN3270 is a special version of this protocol that is used when connecting to IBM mainframe systems. DataComet for the Macintosh and TCP3270 for Windows support both telnet and tn3270. The Comet package was originally developed at Cornell. It has been licensed to an independent company and renamed "dataComet."

Host Address

The host's address can be either a domain name (like rsrch1.cit.cornell.edu) or an IP address (like 128.84.181.1). If you know the name for a host, this is the better approach, in case the IP address ever has to be changed. For a domain name that ends in .cit.cornell.edu, you only need to enter the first part of the name.

Using dataComet for Macintosh

Click on the dataComet button in the Campus Hosts folder of the Bear Access window. A Configure Session dialog box will open.

• If dataComet is already running, you can start a new session by selecting the New command from dataComet's File menu to bring up the Configure Session dialog.

1. In the text field at the top, enter a name for this session. This will appear in the title bar of the session's window and it will be the default file name if you save the configuration as a dataComet document.

2. Under "Terminal type," you can usually use Automatic, since dataComet will negotiate with the host to determine the correct protocol.

3. At the bottom of the dialog box, enter the host's name (for example, jtf.cit.cornell.edu) or address (for example, 132.236.56.6) in the Host Name/Address field.

4. If you are connecting to a specific port at a host system, add a colon and the port number after the host name. For example, to designate port 1240 of the address jtf.cit.cornell.edu use: jtf.cit.cornell.edu:1240 .

5. Click OK and you should connect to the host you requested.

DataComet does not automatically quit when all sessions are closed. Even if you close the windows for all hosts and services using dataComet, the application will still be active in your Macintosh's memory until you select Quit from dataComet's File menu. There is an option (Global... under the Control menu) to have dataComet quit automatically when all windows have been closed.

For more information about dataComet, see its comprehensive built-in help system (choose any topic from the Help menu).

Using TCP3270 for Windows

To connect to a standard host (VT100), select Telnet from the Campus Hosts list in the Bear Access window.

To connect to an IBM mainframe host, select TN3270 instead.

In the Open New Session dialog that appears,

1. Enter the IP address or domain name of your host in the IP Host/Gateway field;
2. If you need to connect to a non-standard port, change the value of the TCP Port field;
3. If in doubt about the Terminal Model, select VT 100.
4. Click the Connect button.

To save information about hosts you connect to frequently, create a Session Profile (Options menu).

TCP3270 includes an extensive on line help system. A TCP3270 for Windows manual (1367 K, requires PDF viewer) is also available online.

Adding Your Own Hosts to the Bear Access Menu

Create a dataComet document for Macintosh

1. Open a connection to the desired host.
2. Under the File menu, select Save Configuration....
3. Enter a name for your session and click Save.

Create a TCP3270 session profile for Windows

1. Open a connection to the desired host.
2. Under the Options menu, select Save Options.
3. Enter a name for your session and click Save and Create Program Icon.
4. Enter Hosts (or the name of your choice) and click Create.
5. A folder named Hosts and a link to your session will be created in the Start menu.
6. To find the link to add to the Bear Access menu, look in C:\Windows\Start Menu\Programs\Hosts (or whatever name you chose to give this folder).