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Description of problem:
When ntpd is configured with a restrict directive using the limited option, disabling the monitoring facility with "disable monitor" will have no effect.
ntpd should print a warning to syslog when that happens to avoid unknowingly allowing the monlist amplification attack (CVE-2013-5211).

Version-Release number of selected component (if applicable):
4.2.6p5-1.el6

How reproducible:
always

Steps to Reproduce:
1. add "limited" to the default restrict lines in /etc/ntp.conf
2. add "disable monitor" to /etc/ntp.conf
3. start ntpd

Actual results:
no warning in syslog, that monitor couldn't be disabled

Expected results:
warning in syslog

Additional info:

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-1459.html