fudge is necessary ? - NTP

This is a discussion on fudge is necessary ? - NTP ; What do you think of my ntp.conf ? These istructions are contained in my ntp.conf of my server: logfile /var/log/ntp.log restrict default ignore restrict 127.0.0.1 restrict server-A mask 255.255.255.255 nomodify restrict server-B mask 255.255.255.255 nomodify # A,B : my internal ...

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Thread: fudge is necessary ?

  1. fudge is necessary ?

    What do you think of my ntp.conf ?


    These istructions are contained in my ntp.conf of my server:

    logfile /var/log/ntp.log
    restrict default ignore
    restrict 127.0.0.1
    restrict server-A mask 255.255.255.255 nomodify
    restrict server-B mask 255.255.255.255 nomodify
    # A,B : my internal time server

    restrict external-time-server-1 mask 255.255.255.255 nomodify noquery
    notrap nopeer
    restrict external-time-server-2 mask 255.255.255.255 nomodify noquery
    notrap nopeer
    restrict external-time-server-3 mask 255.255.255.255 nomodify noquery
    notrap nopeer
    restrict external-time-server-4 mask 255.255.255.255 nomodify noquery
    notrap nopeer
    restrict 127.127.1.0 mask 255.255.255.255

    server external-time-server-1
    server external-time-server-2
    server external-time-server-3
    server external-time-server-4
    # NTP server in Internet

    server 127.127.1.0 # local clock
    fudge 127.127.1.0 stratum 10
    driftfile /var/lib/ntp/drift


    What happens if I erase "server 127.127.1.0" and "fudge 127.127.1.0
    stratum 10" istructions ?
    My internal servers A,B (which retrieve time from this server) need
    these istructions to synchronize themselves ?


  2. Re: fudge is necessary ?

    RICCARDO wrote:
    > What do you think of my ntp.conf ?
    >
    >
    > These istructions are contained in my ntp.conf of my server:


    >
    > server 127.127.1.0 # local clock
    > fudge 127.127.1.0 stratum 10
    > driftfile /var/lib/ntp/drift
    >
    >
    > What happens if I erase "server 127.127.1.0" and "fudge 127.127.1.0
    > stratum 10" istructions ?
    > My internal servers A,B (which retrieve time from this server) need
    > these istructions to synchronize themselves ?
    >


    Those statements enable your system to continue to serve time to clients
    even if the connection to your upstream servers is lost. They are
    needed if, and only if, your system serves time to clients. They will
    give you a few hours, at most, of "holdover" if you lose your UTC
    reference.


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