Solve the problem of “Unencryptedconnectionrefused.Goodbye.” when Linux 5 reports error in telnet

Solve the problem of “Unencrypted connection refused. Goodbye.” when Linux 5 reports error in telnet
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In the Oracle Linux 5 environment, when using remote telnet today, the following error was reported:
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Unencrypted connection refused. Goodbye.
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Solution:
1) Change the parameter “disable” in the file /etc/xinetd.d/ekrb5-telnet to:
disable=yes
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2) Restart the xinetd service:
service xinetd restart
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3) To prevent the system from changing the parameter value again, execute:
chkconfig ekrb5-telnet off
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This solves the problem once and for all, and you’re done!