Disabling Telnet in Linux

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The telnet is insecure and unencrypted protocol. The use of this unencrypted protocol could allow users to sniff network traffic and to steal sensitive information like username and password.

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  1. 1. Login to the server through SSH and su to root.
  2. 2. Edit /etc/xinetd.d/telnet by typing vi /etc/xinetd.d/telnet
  3. 3. Search for the line: disable = no and replace with disable = yes
  4. 4. Save /etc/xinetd.d/telnet and exit
  5. 5. Restart the inetd service: /etc/rc.d/init.d/xinetd restart
  6. 6. Also turn off telnet through: /sbin/chkconfig telnet off

URL: http://www.itsecuritycenter.com/disabling-telnet-in-linux.html

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