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General Chat Thread, Network Time Servers in General; Many thanks for all the responses so far (including the emails). In general we have 3 options. 1 - use ...
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    GrumbleDook's Avatar
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    Many thanks for all the responses so far (including the emails).

    In general we have 3 options.
    1 - use an LA provided service
    2 - purchase a radio-enabled device which synchronises to an external time server
    3 - use a public service and uk.pool.ntp.org seems to be the most popular.

    Now I have another question, based on some of the responses above.
    What device do you set inside your school as your NTP server? We have examples of your DCs, a core switch and a dedicated machine / device? I am tempted to say the DCs (or a single DC anyway) ...

    Opinions?

    I will shortly be writing this up to include in our RBC documentation so examples of practice is appreciated.

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    Quote Originally Posted by GrumbleDook View Post
    What device do you set inside your school as your NTP server?
    Code:
    uk.pool.ntp.org < internal ntp box < DC < clients
                                ^
                            Network & Storage hardware that need a time source before the DCs come up
    If I put a hostname or fqdn into a switch config, it'll do a DNS lookup, convert it into an IP address and save that in the config.

    With a dedicated NTP box, I can swap hardware and give it the same name / IP without breaking anything else. I don't want ReplacementDC on the same IP as OldDC because I'll phase one in and let it percolate before I phase the other out.

  3. Thanks to pete from:

    GrumbleDook (6th October 2011)

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    Quote Originally Posted by GrumbleDook View Post
    What device do you set inside your school as your NTP server?
    We have a dedicated NTP server - it cost us 350 IIRC from Red Herring (www.ntptimeserver.co.uk). It's a simple little thing - cisco hardware with their own software on it and a USB GPS receiver plugged in the back. One of our DCs is set to use it as an authoritive time source, and it just works for us.

  5. Thanks to TheCrust from:

    GrumbleDook (11th October 2011)

  6. #19

    Geoff's Avatar
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    Best practice for a Windows Domain is to Sync to your DCs (as you need kerberos to work!).

    Windows Time Service Best practices: Security Services; Core Services

  7. Thanks to Geoff from:

    GrumbleDook (11th October 2011)

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