+ Post New Thread
Results 1 to 5 of 5
Mac Thread, Authentication Clock Skew Problem in Technical; I thought I had this one licked. apparently not. OSX Tiger on minimacs AD authentication - works fine In system ...
  1. #1


    Join Date
    Jan 2006
    Posts
    8,202
    Thank Post
    442
    Thanked 1,032 Times in 812 Posts
    Rep Power
    339

    Authentication Clock Skew Problem

    I thought I had this one licked. apparently not.

    OSX Tiger on minimacs
    AD authentication - works fine
    In system preferences I set 'set time from time server' pointed it to my ntp server and clicked ok - the time gets updated - excellent. I tick the do it automatically button' then lock the prefs.
    Problem is that the clocks don't update regularly and 2-3months later Kerberos breaks.

    any ideas ?

  2. #2

    Geoff's Avatar
    Join Date
    Jun 2005
    Location
    Fylde, Lancs, UK.
    Posts
    11,807
    Thank Post
    110
    Thanked 583 Times in 504 Posts
    Blog Entries
    1
    Rep Power
    224

    Re: Authentication Clock Skew Problem

    This from experiences with Linux so it might not be 100%, however it's the same software, so...

    If the clock is too far out (ironically more than 5mins or so) NTP will refuse the sync. You must manually set the clock the first time round then tell NTP to sync up.

    The other thing is is it actually using ntpd? or is it just running ntpdate at bootup? really you should do both. ntpdate to get it near enough at boot time for for ntpd and then ntpd to keep it correct.

  3. #3


    tom_newton's Avatar
    Join Date
    Sep 2006
    Location
    Leeds
    Posts
    4,479
    Thank Post
    867
    Thanked 852 Times in 673 Posts
    Rep Power
    197

    Re: Authentication Clock Skew Problem

    Do a test to make sure ntp is being served correctly - make sure the daemon is running on the linux server, and then point ntpdate at localhost.

    If you're fortunate enough to run SchoolGuardian then there's an inbuilt ntp client & server there.

    Also make sure your settings for BST etc. aare consistent.

  4. #4


    Join Date
    Jan 2006
    Posts
    8,202
    Thank Post
    442
    Thanked 1,032 Times in 812 Posts
    Rep Power
    339

    Re: Authentication Clock Skew Problem

    Thanks,
    the ntp server is working fine, the mac updates in the GUI but grumbles when ntpdate is rum from CLI - 'socket in use'. I guess the gui locks ntpdate somehow but the cron or starup script the gui generates doesn't work ?
    I might try not using the gui and puting in a cron job to do it - assuming I can navigate OSX.

  5. #5

    Geoff's Avatar
    Join Date
    Jun 2005
    Location
    Fylde, Lancs, UK.
    Posts
    11,807
    Thank Post
    110
    Thanked 583 Times in 504 Posts
    Blog Entries
    1
    Rep Power
    224

    Re: Authentication Clock Skew Problem

    The 'socket in use' error suggests to me your running ntpd and ntpdate at the same time. One or the other. Personally I'd go with ntpd.

SHARE:
+ Post New Thread

Similar Threads

  1. Censornet authentication problem
    By dezt in forum *nix
    Replies: 14
    Last Post: 16th December 2009, 04:12 PM
  2. Office 2003 Proxy Authentication Problem
    By Stefletch in forum Office Software
    Replies: 8
    Last Post: 10th February 2007, 10:00 AM
  3. Computer clock - time problem
    By speckytecky in forum Hardware
    Replies: 5
    Last Post: 2nd February 2007, 02:23 PM
  4. Clock on PC's not syncing
    By dezt in forum Wireless Networks
    Replies: 11
    Last Post: 6th November 2006, 10:09 PM
  5. Exchange 2003 - Authentication problem
    By pooley in forum Wireless Networks
    Replies: 5
    Last Post: 20th July 2006, 05:44 PM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •