-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Randall R Schulz wrote: > On Tuesday 06 November 2007 05:36, G T Smith wrote: >> James Knott wrote: >>> Damon Register wrote: >>>> ... >>>> >>> Aside from the fact that my ISP doesn't provide NTP on the DNS >>> server, why is DNS time so critical? DNS is simply a database >>> lookup function.
>> But are not inter DNS server updates time stamped?... I would expect >> a DNS server to reasonably well time synchronised... but I would be >> surprised it acted as an ntp server as well... > > I doubt DNS aging rules need millisecond-level precision and accuracy to > operate properly or reliably. NTP is a high-precision, high-accuracy > time protocol. > Agreed... but DNS requires some sort of time control, John seemed to be saying that DNS is simply a database, it is a synchronised distributed database (a much more hairy beast ) ... From the client end all one is doing is a database lookup, but the servers need methods to ensure that the information they hold is reasonably sane, time is just one part of this process... Similarly for Directory Service Servers which are usually synchronised against an ntp time source and may actually take on the workstation time synchronising role in some environments because it is fairly important that both workstations and their servers are in reasonable agreement about time (OK they can all be on the wrong time but that is a different can of worms )... And I emphasise reasonable ... usually about a couple of minutes or so in either direction, more than that and one could be in trouble... > > > Randall Schulz - -- ============================================================================== I have always wished that my computer would be as easy to use as my telephone. My wish has come true. I no longer know how to use my telephone. Bjarne Stroustrup ============================================================================== -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFHMJ+1asN0sSnLmgIRAi6CAKDOW7XDqqbdp8Fnqrh8PAy/SIB2+gCggo1A S1KMnB9HNSlcp8YqSlcKjk0= =IB2p -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
