In this article I will tell you how to use telnet in the Windows 7 operating system. But first, I will briefly talk about what telnet is and what it is used for. Telnet is one of the network communication protocols. It appeared in the last century and was often used for remote connection to various devices online.

And so, let's move directly to our question. In the standard installation in the Windows 7 operating system, this protocol is disabled. If there is a need to use this protocol on workstations running Windows 7, you need to perform some manipulations to enable it. The need to use it may arise not only for system administrators who use it to configure network devices and often use it at work, but also for ordinary users who are far from system administration.

There are at least two ways to enable the telnet protocol in Windows 7.

The first and easiest way is as follows:

In the box, put a checkmark - “Telnet Client”.

That's all, you have successfully enabled the Telnet protocol on your computer.

Another nuance is possible when enabling the protocol using this method; the following situation may occur: when you select “Turn Windows components on or off,” the list of components may be empty. We will be required to make a small adjustment to the register. I remind you how to open the registry by clicking “Start” - just above Start in the search line we type regedit,

After this, you need to reboot the workstation and repeat the above steps.

The second method uses the command line; ordinary users rarely work with it and often do not know that such functionality is available. Therefore, for those who do not consider themselves an advanced user, it is better to use the first method of enabling the protocol.

So, click “Start” - just above Start in the search bar, type cmd and press Enter.

A black window opens in which the cursor blinks, this is what we need - the command line. Next, in this line, type the command “dism/online/Enable-Feature/FeatureName:TelnetClient” and press Enter.

After a short pause, an information window appears indicating that the operation was completed successfully. The Telneta installation is complete.

I hope that my article will be useful. Remember that Telnet is far from a secure protocol, so when working with it you need to remember security measures.

Application layer protocol TELNET (from English. T.E. rmina LNET work) is a network protocol for implementing a text interface over the network. Name telnet We also received client programs for implementing this protocol for almost all existing operating systems. The Telnet protocol is one of the oldest network protocols, developed as a means of communication between remote terminals in test mode. Therefore, it does not provide data encryption or modern authentication tools. The protocol is vulnerable to many network attacks and cannot be used as a means of managing network operating systems. Currently, the SSH (Secure SHell) network protocol is used for remote access to the system, the creation of which focused specifically on security issues. The relative security of Telnet sessions occurs only in a fully controlled network environment or with security applied network level(various implementations of VPN - virtual private networks). However, TELNET is still used to manage specialized network devices (Switches, routers, etc.), as well as for network diagnostics, debugging and studying other text-oriented (telnet-like) protocols based on the TCP transport. The current Telnet protocol standard is described in RFC 854.

In modern OS Windows family, utility telnet.exe by default, not installed. To install it you need to go to Control Panel - Programs and Features - Turn Windows features on or off and check the box for Telnet client. Or in command line running as administrator, run the command:

pkgmgr /iu:"TelnetClient"

Command line format:

telnet [-a][-e Symbol][-f File][-l Name][-t Type][Host [Port]]

Command line options:

-l Login username remote system provided that the TELNET ENVIRON option is supported.

-a Automatic login attempt. Like the -l switch, but uses the current username under which you are logged in.

-e Service character for switching input mode in the telnet client window.

-f Client-side log file name. In the Russian help, this parameter is incorrectly interpreted as Login_File - “File name on the client side for logging into the system.”

-t Telnet terminal type. 4 types of terminals are supported: vt100, vt52, ansi and vtnt.

Knot The host name or IP address of the remote computer to which you are connecting. Port Port number or service name. If the number is not specified, then the standard Telnet port 23\TCP is used

When launched without parameters, the utility goes into command input mode:

Welcome to the Microsoft Telnet Client

Microsoft Telnet>

When entering a character ? or help Help information is displayed:

Teams may be shortened. Supported commands are:

c-close- close the current connection

d-display- display operation parameters

o - open hostname [Port]- connect to the site (by default, Port = 23)

q - quit- exit telnet

set-set- set parameters ("set?" to display a list of them)

sen - send- send strings to the server

st - status- display information about the current state

u - unset- reset parameters ("unset ?" to display a list of them)

? /h - help- issue a certificate

Some of the commands allow you to get hints for use when entered with a question character:

Telnet> set ?- get a hint on using the mode setting command. Example of information displayed:

bsasdel- symbol BackSpace Delete

crlf- carriage return mode; causes CR & LF characters to be sent

delasbs- symbol Delete will be sent as a character BackSpace

escape x- where x is the symbol for switching to telnet terminal mode and back

localecho- enable local echo.

logfile x- where x is the log file. In Russian translation it is incorrectly interpreted as “Current client login file”

logging- recording the current session in the log. In Russian translation it is incorrectly interpreted as "executing a login"

mode x- where x=console is the console mode used to work with windowed applications (vi editor) and x=stream is the streaming mode used to work on the command line.

ntlm- enable NTLM authentication.

term x- type of emulated terminal. Where x is ansi, vt100, vt52, or vtnt.

To get a hint on how to cancel the installed parameters, use the command

Microsoft Telnet> unset?

bsasdel- symbol BackSpace will be sent as a character Delete

crlf- line feed mode; causes the CR character to be sent

delasbs- symbol Delete will be sent as a character Backspace

escape- the symbol for switching to telnet terminal mode and back is not set

localecho- disable local echo

logging- disable log recording. In the Russian-language version it is incorrectly interpreted as "disabling login"

ntlm- disable NTLM authentication.

Examples of commands in interactive mode:

open 192.168.0.1- connect to the Telnet server with an IP address 192.168.0.1

o zte-f660- connect to a Telnet server named zte-f660. Command abbreviation used o pen

set logfile C:\telnet.log- use as log file C:\telnet.log

set logging- record the current session to a log file.

display- display the parameters of the current session. Example of information displayed:

Mode switch symbol: "CTRL+]"

NTLM Authentication - Enabled

Local echo output - disabled

Mode new line- Symbol ENTER will be shipped as CR & LF

Current mode: Streaming

TERMINAL MODE

Preferred ANSI Terminal Type

    In practice, the utility telnet.exe used as a diagnostic and debugging tool to connect not only to the Telnet server on TCP port 23, but also to any other TCP port, thereby allowing interaction with any command line-controlled application. So, for example, using the utility telnet you can connect to servers that support text (telnet-like) input of commands and data - SMTP, POP3, IMAP, etc. In addition, the utility can be used as a means of roughly checking the connectivity to any TCP port (checking whether a specific TCP port is listening).

telnet 192.168.1.1 8080- connect to host 192.168.1.1 on port 8080. In cases where the port is closed, the utility will report that it is impossible to connect. Moreover, to check the availability of a certain port, it is not even necessary that it be listened to by a service that supports text input, such as a VNC server. To disconnect from the remote server, you must enter the mode switching symbol (by default - CTRL+]).

The telnet.exe utility can be used, for example, to communicate with mail server according to the protocol POP3(Post Office Protocol ver. 3). This protocol is used by email client programs (Outlook, Outlook Express, The Bat, etc.) to receive Email, stored in mailbox user. This is the simplest protocol based on text messaging. In order to study the interaction mail client with a mail server, you can implement a connection session using TELNET.

By default, the POP3 server listens for incoming connections via TCP protocol to port 110 ("listens" to port tcp/110). Telnet command to connect to a server, for example pop.mail.ru

telnet pop.mail.ru 110

If the server is healthy, its invitation will appear in the telnet window

+OK mPOP POP3 v1.1

user [email protected]

After which, the server will prompt you to enter a password:

OK Password required for user [email protected]

You need to enter a password

pass VasinPass

The server will report the result of the password check:

You can request a list of letters with a directive list:

list

In response to this, the server will display a list and sizes of letters in the mailbox:

OK 10 messages (152527 octets)
1 48628       1 is the serial number, 48628 is the size
2 1829
3 2070
:

If necessary, you can view the headers of the letters. To do this, use the command top sequence number, space, number of lines from the message body

top 2 0

In response to this, you will see the header of the letter containing service information about the sender, date of sending, return address and some other data:

Received: from (HELO mx1.ks.pochta.ru) by node7-1.ks.pochta.ru with QIP.RU LMTP
for [email protected];
Fri, 08 Apr 2011 15:18:33 +0400
Received: from mx3.softkey.ru ()
: :

The directive is used to receive letters retr sequence number

retr 2 - receive a letter with sequence number 2

To delete a letter, use the directive dele sequence number For example, to remove the 2nd letter from the list received by the directive list:

If the deletion was successful, the server will display the following message:

OK message 2 deleted

Sometimes, the TELNET command can also be used to identify the service listening on the specified port, since many of them display either their banner or specific service information when connected. For example, the FTP server greeting: 220-FileZilla Server version 0.9.43 beta

220-written by Tim Kosse ( [email protected])

220 Please visit http://sourceforge.net/projects/filezilla/

And this is what the screen looks like when connecting to the RealVNC server:

RFB 003.008

telnet.exe is a standard telnet client for Windows operating systems. It allows you to remotely manage various network devices (switches, routers, servers, etc.) using the Telnet protocol. Present in all versions of Microsoft operating systems. IN latest versions(Windows 7, 8 and 10) is deactivated by default and in order to run telnet.exe you need to additionally activate it in the OS components.

Program location: folder

Telnet commands:

c- close - close the current connection d- display - display the operation parameters. Available options: - WILL AUTH (NTLM authentication) - WONT AUTH - WILL TERM TYPE - WONT TERM TYPE - LOCALECHO off - LOCALECHO on o- open hostname [Port] - connect to the site (by default, Port = 23) q- quit - exit telnet set- set set parameters ("set?" to display a list of them). Available options: - bsasdel character will be sent as a character - crlf carriage return mode; causes CR & LF characters to be sent - delasbs the character will be sent as a character - escape x where x is the character to switch to telnet terminal mode and back - localecho enable local echo. - logfile x where x is the current client's login file - logging performing a login - mode x where x is the console or stream - ntlm enable NTLM authentication. - term x where x is ansi, vt100, vt52, or vtnt sen- send - send strings to the server st- status - display information about the current status u- unset - reset parameters ("unset ?" to display a list of them) Available parameters: - bsasdel the character will be sent as a character - crlf carriage return mode; causes CR characters to be sent & LFbsasdel character will be sent as character - crlf line feed mode; causes the CR character to be sent - delasbs the character will be sent as a character - the escape character to switch to and from telnet terminal mode is not specified - localecho disables local echo - logging disables login execution - ntlm disables NTLM authentication. ?/h - help display help

Enable telnet in Windows:

The sequence of actions is as follows:

1. Go to the Windows 10 Control Panel and find the “Programs and Features” section. Once in it, in the menu on the right we find the item “Turn Windows components on or off”:

The “Windows Components” window will open in which you need to find and check the box Telnet client.
Click on “OK” and wait for the changes to complete:

Click on “Close”. Done, we have successfully installed telnet.exe on Windows 10.

How to run Telnet in Windows:

Press the Win+R key combination to open the Run window:

In the “Open” line enter the command cmd and click on “OK”.
So we will launch the Windows command line.
Then enter the command telnet and press the “Enter” key. The Windows 10 telnet client is running and you can use it.

Teams telnet allow you to contact remote computer using the Telnet protocol. You can run the command telnet without parameters to enter the telnet context indicated on the Telnet command line ( telnet). From the Telnet command line, use the following commands to control the computer running the Telnet client.

Teams tlntadmn allow you to remotely control a computer running a Telnet server. These commands are executed from the command line. Team tlntadmn without parameters displays the local server setting.

To use commands telnet from the Telnet command line

To launch the Telnet client and enter the Telnet command line

Syntax

telnet [\\ remote server]

Options \\ remote server Displays the name of the connected server /?

• When using the command telnet The Telnet client starts without parameters.
• At the Telnet command line, you must use Telnet commands.

To stop the Telnet client

Syntax

Options

none

Notes

• This command can be shortened to q.

To connect a Telnet client to a remote computer

Syntax

open [\\ remote server] [port]

Options \\ remote server port Indicates the port to use. If no port is specified, the default port is used. Notes

• This command can be shortened to o.

Examples

To connect to the remote Redmond server on port 44, enter at the command prompt: redmond 44

To disconnect the Telnet client from the remote computer

Syntax

close [\\ remote server]

Options \\ remote server Specifies the name of the managed server. If the server is not specified, it is used local server. Notes

• This command can be shortened to c.

Examples

To disconnect from the remote Redmond server, enter the command: c redmond 44

To configure Telnet client settings

Syntax

set [\\ remote server] [ntlm] [localecho] [term {ansi | vt100 | vt52 | vtnt}] [escape symbol] [logfile file name] [logging] [bsasdel] [crlf] [delasbs] [mode {console | stream}] [? ]

Options \\ remote server Specifies the name of the managed server. If no server is specified, the local server is used. ntlm Enables NTML authentication if available on the remote server. localecho Enables local command display mode. term {ansi | vt100 | vt52 | vtnt) Specifies a terminal of the specified type. escape symbol Specifies the control character. The control character can be a single character or a combination of the CTRL key and a character. To set a key combination, hold down the CTRL key while typing the character you want to assign. logfilefile name Specifies the Telnet activity log file. The log file must be located on the local computer. Logging starts automatically after selecting this option. logging Enables logging. If a log file is not specified, an error message is displayed. bsasdel Specifies the BACKSPACE key to delete. crlf Assigns a new linear mode that defines the ENTER key as 0x0D, 0x0A. delasbs Assigns the DELETE key to delete the last character. mode {console | stream) Sets the operating mode. ? Allows you to view the full command syntax. Notes

• To disable a previously assigned setting, at the Telnet command prompt, enter:

  unset [parameter]

• To assign a control character, enter the command:

  -e symbol

• In non-English versions of Telnet, the command is available codeset parameter. Codeset parameter specifies the current code set for the parameter, which can be one of the following: Shift JIS, Japanese EUC, JIS Kanji, JIS Kanji (78), DEC Kanji, NEC Kanji. You must assign the same code set on the remote computer.

To send Telnet client commands

Syntax

send [\\ remote server] [ao] [ayt] [esc] [ip] [synch] [? ]

Options \\ remote server The name of the server that you want to manage. If no server is specified, the local server is used. ao Cancels an input command. ayt Sends the command "Are you there?" esc Sends the current control character. ip Aborts execution of a processing command. synch Performs a Telnet synchronization operation. ? Allows you to view the full command syntax.

To view the current Telnet client settings

Syntax display

Options

None

Notes

• This command displays the current operating parameters for the Telnet client. When operating in Telnet session mode (in other words, while connected to a Telnet server), you can exit the session to change settings by pressing CTRL+]. To return to the Telnet session, press ENTER.

To use commands tlntadmn from the command line

To administer a computer running Telnet server/P>Syntax

tlntadmn [\\ remote server] [start] [stop] [pause] [continue]Options \\ remote server Specifies the name of the server that you want to take control of. If no server is specified, the local server is used. start Starts the Telnet server. stop Stops the Telnet server. pause Terminates the Telnet server. continue Restarts the Telnet server. /?

• Using commands tlntadmn tlntadmn

To administer Telnet sessions

Syntax

tlntadmn [\\ remote server] [-s] [-k{session_code | all}] [-m {session_code |all} " message" ]

Options \\ remote server -s Displays active Telnet sessions. -k{session_code | all) Ends sessions. Enter a session code to end a specific session or enter all to end all sessions. -m {session_code | all} " message" Sends a message to one or more sessions. Enter a session code to send a message to a specific session, or enter all to send a message to all sessions. Type the message you want to send in quotes (i.e. " message" ). /? Displays help on the command line. Notes

• Using commands tlntadmn you can remotely administer a computer running a Telnet server if both computers are running Windows control XP. Teams tlntadmn cannot be used to remotely administer a Telnet server running Windows 2000 from a computer running Windows XP.

To set event log settings for the computer running Telnet Server

Syntax

tlntadmn [\\ remote_computer] config [auditlocation={eventlog | file | both}][audit=[{+ | - } admin][{+ | - } user][{+ | - } fail]]

Options \\ remote server auditlocation={eventlog | file | both) Specifies whether event information should be sent to the Event Viewer, to a file, or to both. audit=[{+ | - } admin][{+ | - } user][{+ | - } fail] Specifies which events require auditing (administrator logon events, user logon events, or failed logon attempts). To audit a specific event type, enter a plus sign (+) in front of the event type. To stop auditing of a specific event type, enter a minus sign (-) in front of the event type. /?

• Using commands tlntadmn You can remotely administer a computer running Telnet Server if both computers are running Windows XP. Teams tlntadmn cannot be used to remotely administer a Telnet server running Windows 2000 from a computer running Windows XP.
• If you specify where to send event information without specifying the information type or types to be audited, only administrator log event information will be audited and sent to the specified location.

Examples

To send event information to the Event Viewer, enter:

tlntadmn config auditlocation=eventlog

To audit administrator logon events and failed logon attempts, enter:

tlntadmn config audit=+admin +fail

To set the primary domain for the computer running Telnet Server

Syntax

tlntadmn [\\ remote server] config [dom=domain name]Options \\ remote server Specifies the name of the server that you want to take control of. If no server is specified, the local server is used. dom=domain name Specifies the domain that you want to make primary. /? Displays help on the command line. Notes

• Using commands tlntadmn You can remotely administer a computer running Telnet Server if both computers are running Windows XP. Teams tlntadmn cannot be used to remotely administer a Telnet server running Windows 2000 from a computer running Windows XP.

Examples

To make the Redmond domain the primary domain on your local server, enter:

tlntadmn config dom=Redmond

To map the ALT key to the computer running the Telnet server

Syntax

tlntadmn [\\ remote server] config [ctrlakeymap={yes | no}]

Options \\ remote server Specifies the name of the server that you want to take control of. If no server is specified, the local server is used. ctrlakeymap={yes | no) Indicates whether the Telnet server should interpret the CTRL+A key combination as ALT. Enter yes to map a keyboard shortcut or no to refuse matching. /? Displays help on the command line. Notes

• Using commands tlntadmn You can remotely administer a computer running Telnet Server if both computers are running Windows XP. Teams tlntadmn cannot be used to remotely administer a Telnet server running Windows 2000 from a computer running Windows XP.
• If ALT key is not mapped, the Telnet server does not send the ALT keystroke to applications where it might be required.

To set the maximum number of connections for the computer running Telnet Server

Syntax

tlntadmn [\\ remote server] config [maxconn=positive_integer]

Options \\ remote server Specifies the name of the server that you want to take control of. If no server is specified, the local server is used. maxconn=positive_integer Sets the maximum number of connections. This number can be specified using any positive integer less than 10 million. /? Displays help on the command line. Notes

• Using commands tlntadmn You can remotely administer a computer running Telnet Server if both computers are running Windows XP. Teams tlntadmn cannot be used to remotely administer a Telnet server running Windows 2000 from a computer running Windows XP.

To set the maximum number of failed access attempts for the computer running the Telnet server

Syntax

tlntadmn [\\ remote_computer] config [maxfail=positive_integer]

Options \\ remote server Specifies the name of the server that you want to take control of. If no server is specified, the local server is used. maxfail= positive_integer Sets the maximum number of failed login attempts allowed for a user. This number can be specified using any positive integer less than 100. /? Displays help on the command line. Notes

• Using commands tlntadmn You can remotely administer a computer running Telnet Server if both computers are running Windows XP. Teams tlntadmn cannot be used to remotely administer a Telnet server running Windows 2000 from a computer running Windows XP.

To set the operating mode for the computer running the Telnet server

Syntax

tlntadmn [\\ remote server] config [mode={console | stream}]

Options \\ remote server mode {console | stream) Indicates the operating mode. /? Displays help on the command line. Notes

• Using commands tlntadmn You can remotely administer a computer running Telnet Server if both computers are running Windows XP. Teams tlntadmn cannot be used to remotely administer a Telnet server running Windows 2000 from a computer running Windows XP.

To set the Telnet port for the computer running the Telnet server

Syntax

tlntadmn [\\ remote server] config [port=integer_value]

Options \\ remote server Specifies the name of the server that you want to take control of. If no server is specified, the local server is used. port=integer_value Specifies the Telnet port. The port can be specified using any integer less than 1024. /? Displays help on the command line. Notes

• Using commands tlntadmn You can remotely administer a computer running Telnet Server if both computers are running Windows XP. Teams tlntadmn cannot be used to remotely administer a Telnet server running Windows 2000 from a computer running Windows XP.

To set authentication methods for the computer running the Telnet server

Syntax

tlntadmn [\\ remote server] config [sec=[{+ | - } ntlm][{+ | - } passwd]]Options \\ remote server Specifies the name of the server that you want to take control of. If no server is specified, the local server is used. sec=[{+ | - } ntlm][{+ | - } passwd] Specifies whether NTML or password authentication is used, or both, to authenticate login attempts. To use a specific authentication type, enter a (+) sign in front of the authentication type. To prevent a specific type of authentication from being used, enter a (-) sign in front of that type. /? Displays help on the command line. Notes

• Using commands tlntadmn You can remotely administer a computer running Telnet Server if both computers are running Windows XP. Teams tlntadmn cannot be used to remotely administer a Telnet server running Windows 2000 from a computer running Windows XP.
• NTML is an authentication protocol for transactions between two computers, one or both of which are running Windows NT 4.0 and earlier. Additionally, the NTML authentication protocol is used for computers that are not part of a domain, such as independent servers and workgroups.

To set the idle session timeout for the computer running the Telnet server

Syntax

tlntadmn [\\ remote server] config [timeout=hh: mm: ss]

Options \\ remote server Specifies the name of the server that you want to take control of. If no server is specified, the local server is used. timeout=hh: mm: ss Sets the elapsed time value in hours, minutes, and seconds. /? Displays help on the command line. Notes

• Using commands tlntadmn You can remotely administer a computer running Telnet Server if both computers are running Windows XP. Teams tlntadmn cannot be used to remotely administer a Telnet server running Windows 2000 from a computer running Windows XP.

Notes

• To switch from the Telnet client to command mode, at the Telnet command prompt, press CTRL+]. To return to the Telnet client, press ENTER.

Few computer users today are aware of the existence of various special protocols on the computer that allow, without the use of a graphical interface, third party programs perform various actions. Therefore, the desire to learn how to use the TELNET service immediately arises when they learn about the corresponding protocol.

Next, we will outline a little theory about what TELNET is, what many strive to master it for: the capabilities of the service, as well as a list main commands, allowing these features to be implemented on Windows.

TELNET is a communication tool that establishes a transport connection between terminal devices, clients, that is, your computer and someone else’s machine, a server that supports this connection standard. This is not a special program, but just a network protocol, but the word TELNET (terminal network) also refers to various utilities that also use this protocol. Today Telnet is present almost everywhere, all operating systems, one way or another, use it, in

TELNET implements a text interface, which differs from the graphical interface familiar to the average user in that all commands must be entered manually.

What does all this give us?

Previously, this service was one of the few ways to connect to the network, but over time it has lost its relevance. Today there is much more convenient programs, which do all the work for the user and do not force him to memorize various commands in order to perform the simplest actions. However, some things can still be done using Telnet.

Network connections

With Telnet you can:

• connect to remote computers;
• check the port for access;
• use applications that are only available on remote machines;
• use various directories that can only be accessed in this way;
• send emails without using special programs (clients);
• understand the essence of the work of many protocols used today and derive certain benefits from this;
• provide other users with access to data located on their computer.

Let's start using it

Launch

Launching TELNET on Windows 7 and any other Windows is quite simple. To do this, you first need a client, if it is not already installed:

• Go to the Control Panel.

• Select “Programs”.
• Select the “Turn Windows features on or off” tab.

• Find the Telnet client and put a marker next to it if it is not already installed.

Then click “OK” and wait a minute while the client is installed.

The terminal is launched in Windows via the command line, if you do not have any installed special utilities for working with Telnet. But since you are reading this article, it means that you are just starting to get acquainted with this topic, and first it would be nice to master the basics of management using the command line.

1. Launch the command line as administrator.
2. Enter "telnet".

The command line will reboot, and the TELNET command line will now open, in which we will work.

Checking the port

One of the simplest actions performed in TELNET is port checking. You can check the port to see if it can be accessed from your computer. To do this you need to do the following:

In the command line opened using the method above, enter: telnetip address port number

For example, if your IP address is 192.168.0.1 and the port number is 21 (FTP port), then enter:

telnet 192.168.0.1 21

If the command produces an error message, it means the port is unavailable. If appears empty window or a request to enter additional data, which means the port is open. For Windows, this method of checking the port can be quite convenient.

Teams

TELNET commands are the basis for using the terminal. With their help, you can control a computer that uses this protocol, if access is allowed for you, as well as perform various other actions. As mentioned above, on Windows they are entered in the command line of the Telnet application.

To see the main list of commands, enter in the line help and press "Enter". Basic commands:

1. Open- connection to a remote server. You must enter this command along with the managed server name and port number, for example: openredmond 44. If parameters are not specified, the default local server and port are used.
2. Close- disconnection from remote server. Similar parameters are used.
3. Set- setting up a remote server, used with the name of the managed server. Together with Set The following commands are used:
   1. - used to specify a terminal of the specified type.
   2. - sets the control character.
   3. - sets the operating mode.
4. Unset [option]- disables a previously specified parameter.
5. Start- starts the Telnet server.
6. Pause- pauses the server.
7. Continue- resumes work.
8. Stop- stops the server.

TELNET is one of the oldest protocols, but it is still used today. This means that you can start using it for your own purposes. To do this, you just need to learn the syntax and list of commands and start practicing. You can learn a lot of new things, and at the same time begin to look at the Internet and your previously familiar online activities in a completely different way.