what is the "telnet"command in the command prompt?

Question

can you please tell me what is it and how to control on it and use it

Answer 1

Telnet is used to access other systems from a command line (no graphics). The command predates Microsoft and is used primarily to access server systems (UNIX, Linux, BSD, MainFrames, VAX, etc...). Although telnet is still common, the more preferred method for accessing systems is through ssh or secure shell. Telnet has been criticized for being a bit weak on security.

As for how to use it, you first need a system that you can telnet to. Microsoft servers usually have the ability to be "telneted" to but it isn't enabled by default (at least on most of the systems I've seen). The general syntax though is:

telnet myserverhost

or you can go by IP address

telnet 192.168.1.1

In fact, you may try telneting to your router to see if it accepts telnet request.

** Edit **
A popular ssh client for Microsoft systems is PuTTY

** Edit **
Matt I - While the typical end user may not work with telnet, it is still a fairly popular utility in data center environments. We tend to run Oracle and other high availability applications on Solaris and use telnet for managing applications. We also use Network Attached Storage (NAS) devices that have options to be configured via telnet too. You certainly wouldn't see this used in home configurations but if you work in a data center that hasn't been forced to go to Microsoft, telnet and/or PuTTY are probably still in use.

Answer 2

As a supplement to the 1st post:

You can telnet to other services as well, for example:

Telnet to a mail server (smtp):
telnet mail.myisp.com 25

Telnet to your pop account (pop):
telnet pop3.myisp.com 110

Telnet to a web server (http):
telnet www.google.com 80

If you know the commands for a service, you can do (and see) some interesting stuff.

Note - those numbers after the host are ports. There are 65536 ports available. Below 1024 are reserved for the most common of services.

The Data Analyst - http://www.squidoo.com/thedataanalyst

Answer 3

Telnet stands for TELetype NETwork and is a basic network protocol that is not really used much any more.

To use it you need to find a telent server.

There's LOADS on it at http://www.happyhacker.org/ in the help for beginners section.

And also most of the info on the command can be found at: http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/telnet_commands.mspx?mfr=true

You can also use telnet for sending emails. Long time, no do for me though - it must be at lease 10 years since I last needed to use it.

Answer 4

Access Denied in the CLI is the same as in the GUI, it means you don't have access to whatever you are trying to do. Does the Command Prompt launch or does it give you access denied before it even starts? If the Command Prompt does not launch then you need to talk to the administrators, if it does then try to switch directories to one you have access too. Type with quotes. cd "C:\Documents and Settings\%username%\Desktop"