Criticism
OpenNTPD has been criticized as being less accurate than the NTP daemon produced by the Network Time Protocol Project. While the OpenNTPD project admits the plausibility of this claim, it claims this as a trade-off between microsecond precision and the benefits of simplicity and security OpenNTPD offers.
OpenNTPD has also been criticised for violating the NTP protocol by omitting correct information on the accuracy of transmitted data: OpenNTPD servers claim to be infinitely accurate (earlier versions claimed to be in stratum 1; while this particular issue has been fixed, OpenNTPD 3.9p1 still serves time with a zero dispersion).
Shortly after the release of OpenNTPD 3.6, Brad Knowles wrote an article entitled OpenNTPd Considered Harmful criticizing various aspects of OpenNTPD, as well as the split development model that the project employs, which is also used in the development of OpenSSH and OpenBGPD. Darren Tucker, the main developer on the portable branch of OpenNTPD, wrote a detailed response to this article, discussing some of the issues addressed in the OpenNTPD 3.6.1 release and branding some of Knowles comments "quite misleading." Knowles' article also prompted the addition of a section to the OpenBSD networking FAQ explaining and rebutting its claims.
Read more about this topic: Open NTPD
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