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Re: Tim Synchronization for IBM VM and MVS System

daemon@ATHENA.MIT.EDU (Steve Howie)
Thu Feb 7 12:44:17 1991

Date: Thu, 7 Feb 91 12:12:04 EST
From: scotty@negril.cs.uoguelph.ca (Steve Howie)
To: kerberos@ATHENA.MIT.EDU


>IBM is delivering an implementation of Kerberos authentication
>server as part of it's VM TCP/IP Version 2 package.  IBM has also
>announced that it has a statement of direction to include similar
>facilities in its MVS implementation.

>I don't understand, however, how a VM or MVS based Kerberos
>authentication server could be brought into close time
>synchronization with application clients and servers on
>different machines.

>I realize this is probably an extremely naive question, so if
>the answer is RTFM, please point me to it.  Thanks.

  >Richard Hintz  opsrjh@uccvma.ucop.edu  opsrjh@uccvma
  >University of California

We are looking seriously at the VM Kerberos implementation, and have some concern about this very question of  
clock synchronization. If any other VM sites out there have addressed this already, we'd like to hear from them.

Scotty

p.s. After I RTFM, all I could find concerning time synchronization was on page 250 of the TCP/IP  Version 2 for  
VM: Programmer's Reference -  a 2 line note saying:

" The design of Kerberos assumes that system clocks are synchronized to within a few minutes on all machines that  
run Kerberos-authenticated services"

Helpful, eh ?  :-)

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