Red Hat Bugzilla – Bug 18499
ntpdc passwords don't work (ntp v4)
Last modified: 2007-03-26 23:36:16 EDT
Please note that this is also a bug in the current ntp distribution from
ntp.org, but I thought you would want to know, and perhaps fix it ...
ps: I logged this under xntp3 because you don't have a way of entering bugs
for ntp. You can SEARCH for bugs in component ntp, but you'll never find any,
since ntp is not listed as a valid component for ENTERING bugs.
Under xntp3, the following segment in the ntp.conf file worked:
Under ntp v4, this will NOT allow the use of passwords with key "1234" unless
either the "enable auth" line is removed, OR the following line is added to
So, this is presumably a change in the authentication requirements for ntp v4.
According to the author of ntp (Professor David Mills of the University of
Delaware), the authentication code in ntp v4 has been tighted, and this is
expected behavior. Hence, it is not a bug and the resolution is to include
the "trustedkey" line shown above in ntp.conf.