How to install TELNET services on Linux?

Telnet is a Terminal emulation protocol that allows remote access to a system. Telnet can also refer to software which can be used by a client to remotely connect to and configure operating systems and network devices

TELNET uses TCP port 23 by default

Installing TELNET

·         Enabling telnet service by editing telnet file

     #vim /etc/xinetd.d/telnet

Editing telnet file

Service telnet

{

Flags                                 =   REUSE

Socket_type                      =  stream

Wait                                  =  no

User                                  =  root

Server                               =  /user/sbin/in.telnetd

Log_on_failure                += USERID

Disable                             = no      

}

Here Disable, no =  enable and yes = disable.

·         Chkconfig and restarting xinetd service

#chkconfig xinetd on

#service xinetd restart

·         Adding server ip and client ip in hosts file

                 #vim /etc/hosts

Editing hosts file

192.168.156.1             server.digtuts.com

192.168.156.2             client.digtuts.com

192.168.156.3             practice.digtuts.com

Note: up to this step, this will not allow you to login as a root from your client machine, so create a new user.

·         Loging in with new user name with password

#telnet 192.168.156.1

Login:digesh

Password:

Note: it won’t login with blank password. User password must be clear or deleted

·         By default no one can login as a root by telnet from client, to enable the root login edit remote file.

#vim /etc/pam.d/remote

Edit remote file

#auth required pam_security.so

After doing this you are able to login as root from client.