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Configuring Telnet Server on Linux (CentOS, RHEL 6, Fedora)

 July 9  | 0 Comments

In this Blog, we will learn how to configure Telnet Server on Centos Linux. Telnet protocol allows you to connect to remote hosts over TCP/IP network.

We need three packages to configure telnet server in Linux:

A. xinetd

B. telnet-server

C. telnet-client

Note: Use root to configure Telnet server.

Below are the steps to configure the same:

Server-side Configuration –

Step 1 – Install the Telnet package.

yum install telnet telnet-server -y

This command will also install the dependency package. (i.e. xinetd)

Step 2 – Once you have installed the packages, open /etc/xinetd.d/telnet file

vi  /etc/xinetd.d/telnet

 

Then update this file according to below image:

Ensure to make disable = no.

 

Save and quit the file.

Step 3 – Now start the telnet service using the following command:

service xinetd start

 

Step 4 – Turn the Telnet server on using the chkconfig command to start automatically on every reboot.

chkconfig telnet on
chkconfig xinetd on

 

Step 5 – Allow telnet into Linux firewall.

vi /etc/sysconfig/iptables

Next, Add this line (refer below image)

-A INPUT -p tcp -m state --state NEW --dport 23 -j ACCEPT

 

Restart the iptables services:

service iptables restart

Step 6 – We need to create a normal user to access telnet, hence by default root is not allowed to access it.

 

Step 7 –  Verify your telnet server whether it is working or not?

telnet ipaddress

 

Here we have configured the telnet-server, now we need to configure telnet client.

 Telnet-client side configuration –

Step 1 – Go to client and Install the telnet package-

yum install telnet

 

Step 2 – type the following command to check connectivity with server-

ping  server_ip

 

We are getting reply of ping from server so we have connectivity with server.

Step 3 – Now connect with your telnet server using below command-

telnet server-ip

 

The telnet server for Linux is thus configured.

Hope this Blog was informative enough. 

Feel free to contact us at support@acadgild.com for any further query.

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