Telnet is unsecure network protocol it send clear text passwords over network.
Its highly recommended to disable it on any public server and use ssh server instead.
This following tutorial on how to disable it in CentOS linux.
Login as root and open this file:
Code:
nano /etc/xinetd.d/telnet
Disable Telnet:
Code:
disable = yes
CTRL+O (to save) and CTRL+X (to exit)
Now disable it in chkconfig:
Code:
chkconfig telnet off
Restart xinetd:
Code:
/etc/rc.d/init.d/xinetd restart
