SSH is strongly recommended but just in case if you need Telnet server…

In order to turn Telnet on make sure that you have install the telnet-server and telnet RPMs:
Code:
yum install telnet-server telnet
Open /etc/xinetd.d/telnet
Code:
vi /etc/xinetd.d/telnet
Make sure that disable = yes is changed to read disable = no.
Code:
disable = no
Type following to enable and start service on port 23:
Code:
chkconfig telnet on
chkconfig xinetd on
service xinetd restart
Warning
Again, I recommend that you use SSH to connect to a system instead of Telnet for security purposes.