Thanks Ben, that makes a lot of sense as to how a "rogue" server couldn't cause any chaos (I'm not an expert in NTP, I just bang in several reputable servers and let the OS sort it out).
Paul ________________________________________ From: Ben Scott [[email protected]] Sent: 22 September 2011 5:17 PM To: NT System Admin Issues Subject: Re: Public time sources On Thu, Sep 22, 2011 at 11:59 AM, Paul Hutchings <[email protected]> wrote: > With my tinfoil hat on, do they take any steps to ensure the accuracy of > your time if you choose to join the pool? The ntp.org pools consist of thousands of autonomous donor systems. Your level of assurance is proportional to the number of servers you associate with. Want a higher level of assurance? Use more servers. Anyone lying to you will quickly be seen as out-of-sync and discarded. At least, that's the way Delaware NTP works; I can't speak to Microsoft's implementation. One can also use GPS as a highly-accurate time source (sub-second accuracy). I'm told implementation cost can be under $100. So that's an option for the truly demanding. (GPS depends on time sync (each satellite has an on-board atomic clock), so by definition any GPS receiver has highly-accurate time. Not all of them expose it in a useful fashion, though.) -- Ben ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin -- MIRA Ltd Watling Street, Nuneaton, Warwickshire, CV10 0TU, England Registered in England and Wales No. 402570 VAT Registration GB 100 1464 84 The contents of this e-mail are confidential and are solely for the use of the intended recipient. If you receive this e-mail in error, please delete it and notify us either by e-mail, telephone or fax. You should not copy, forward or otherwise disclose the content of the e-mail as this is prohibited. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
