On Thu, Feb 6, 2014 at 9:03 PM, Notify Me <notify.sina@gmail.com> wrote: I'm trying to help a company I work for to pass an audit, and we've
been told we need trusted NTP sources (RedHat doesn't cut it). Being located in Nigeria, Africa, I'm not very knowledgeable about trusted sources therein.
Obviously "trusted" time sources are important, but at the end of the day you have to trust someone who ultimately has the least risk (there is never no risk) you are able to achieve. I appreciate "least level of risk" is subjective to your auditors opinion (in this case) :-) Just wanted to mention, having a good number of servers (not blindly trusting <= 3 unique sources) adds some additional protection against 'false-tickers'. Even "trusted" time-sources have their off-days due to a myriad of technical reasons. Configure multiple, relatively high stratum (taking into account how many stratum's you intend to serve downstream), low-jitter/rtt, good-quality, time-sources. Also, risk changes over time, so vigilant monitoring is important too! Regards, Chris.