Good point - that is just how I do it on my server network, sorry. reminds me of a good point Q: what is the different between in theory and in practice? A: In theory, NOTHING. ;-) so we test and iterate until we get it right in practice. G. On Mon, Aug 20, 2012 at 4:48 PM, wrote: > On Mon, 20 Aug 2012, George Lambert wrote: > > Check and set the time by syncing to NTP Servers - not user supplied times >> if the network >> is available. to see if they have set times > those set by NTP Server >> > > In theory you are right, in practice you are not. > > it's not uncommon for systems to point at a local set of timeservers (GPS > based for example), sometimes things go wrong with those servers, and so > people configure a local fallback (because they need the clocks on the > systems to remain consistant for things like kerberos to keep working). > This leads to a failure mode where if something goes wrong on that system, > the time can get set via NTP to some time in the future. > > There needs to be a way to recover from such conditions. > > The recent problems that people had with leap seconds is an indication > that even if you do use Internet NTP servers, sometimes things go wrong. > > David Lang > > -- P THINK BEFORE PRINTING: is it really necessary? This e-mail and its attachments are confidential and solely for the intended addressee(s). Do not share or use them without approval. If received in error, contact the sender and delete them.