TELNET
Telnet is
the internet's remote login protocol. Also called terminal emulators, a telnet
client application lets you use a computer at one end of the network and remotely log in
to conrol another computer located somewhere else on the network. Most often used with
multi-user operating systems such as UNIX, telnet provides you with all the capabilities
of someone who is typing directly on the remote computer's keyboard.
Of course, the remote computer has to be configured to accept telnet requests. In
other words, it has to be connected to the network, and it has to be running a telnet
server application.
UNIX systems are made from the ground up to be networked
computers. Therefore, every UNIX system has a telnet server and client
capability. To use telnet on UNIX, you type:
For instance, to telnet to ei.cs.vt.edu, the server machine these class web pages are
located, your interaction with your telnet client on your local computer would be:
In actuality, you are talking to the remote computer, using the telnet client on your
local computer and the telnet server on the remote computer as the "telephone"
through which your dialog carries.
Ewan is a popular Telnet and terminal emulator for PCs which emulates DEC VT100
(the most popularly emulated terminal), and ANSI terminals. It serves as a remote computer
access tool (application), communication software for the Internet (analogous to a simple
modem communications package), and implements the Internet remote login protocol.
Features/Commands
- Open/Close -- Connect & Disconnect commands
- Display/Status -- Operating/Communication parameters
- Set/Toggle -- Change operating parameters
Special Ports
- Specific ports are listened to by different server applications.
- Allows servers to easily provide different services.
EWAN Client Configuration
Adding a New Address
EWAN Sample Connection
CBX Connection
- Text interface based Telnet clients on mainframes require an escape sequence 'CNTRL-^]'
to specify commands.
- EWAN uses menus for normal telnet commands.
- Many mainframes provides a text based version of telnet.
Further Exploration