Telnet

• Telnet is a network protocol that allows remote login over a network. It supports cross-platform, that is a client sitting on a windows machine can access a telnet server configured on a Linux machine.
• It runs on port number 23.
• In telnet data is transmitted in clear text over a network, that is it can be viewed by a third party over the network, however, we can configure telnet to encrypt data before transmitting.

Installation

yum

yum install telnet-server

rpm

• If telnet-server package is available in local filesystem then we can install it directly from local system using rpm command.

  $cd PATH_OF_DIRECTORY_CONTAINING_TELNET_SERVER_PACKAGE
  $rpm -ivh telnet-server
  

Configuration

• Configuration file for telnet is /etc/xinetd.d/telnet.

• Telnet service is disabled by default in its configuration file. We have to manually enable it by changing disabled to no.

  That is, change

  disable = yes
  

  To

  disable = no