CMOS clock

BeerCheeze · Posted: Tue, 21 Dec 2004 16:17:38 Post Subject:

Nope... Long story short... It's a time based security thing that they need to keep the time sync'd

FOX · Posted: Tue, 21 Dec 2004 21:11:35 Post Subject:

sorry to post kinda late... my clock on my comp is really fast and i mean bad.... ive had to reset it twice now in a couple weeks... itll be off by hours, not minutes

thePMG · Rated XXX Joined: 24 Apr 2004 Posts: 393 Location: Germany

My Ultra 10 has a fast clock, I used to use ntpd to tame it.

**JimBowy** · Moderator Joined: 02 Aug 2003 Posts: 1627

BeerCheeze · Posted: Wed, 22 Dec 2004 00:45:12 Post Subject:

The problem is guys, it doesn't work on a network when a PC is in the Active Directory. Basics of it are, the authenitcation uses time stapms for security reasons (to disallow a replay attack), and so when a PC logs into the AD tree it's time is synced with the domain. You can change it until your blue in the face... it will get changed back.

Of course I'm ASSUMING that his computer is part of the domain, and it's not an NT4 domain.

trekrider · Posted: Wed, 22 Dec 2004 01:50:43 Post Subject:

If I understand you correctly.......in a nutshell.....the time is controlled by the MAIN box (the server) on a network.

If this is true, how/why does the time difference INCREASE over a span of time?? Wouldn't the main box time stamp just push everything over to the time stamp of the file, and every box on the network show the same time??

Also, how does it override the local box's CMOS realtime clock??

**Doctor Feelgood** · Posted: Wed, 22 Dec 2004 12:43:37 Post Subject:

My machine at work is always a few minutes fast, and although I can change the time, when I ever I reboot the time changes back to what the system wants it to be... Bang Head

BeerCheeze · Posted: Wed, 22 Dec 2004 12:45:06 Post Subject:

If the time on the server is off, or gains then it will push that out to all PC's. The DC should be using SNTP to set itself to the atomic clock; however in smaller networks many times the admin's don't know how to do this. Sad

And the OS will "write back" to the CMOS clock. Try it manually... set the CMOS clock off, then change it in the OS, reboot to the BIOS and... you'll see it's what it got changed to in the OS.