But Ed, even though tick.usno.navy.mil and tock.usno.navy.mil have open access policies, it's considered bad form to sync with stratum-1 time servers directly. Unless, of course, you're part of a reliable stratum-2 full-NTP subnet. The higher the load on stratum-1, the less accurate the servers become, and there are in fact people trying to use them as a time source for scientific applications.
See "rules of engagement" at http://www.eecis.udel.edu/~mills/ntp/servers.htm :::Ryan Malayter :::Sr. Network & Database Administrator :::Bank Administration Institute :::Chicago, Illinois, USA :::PGP Key: http://www.malayter.com/pgp-public.txt -----Original Message----- From: Ed Crowley [mailto:[EMAIL PROTECTED]] Posted At: Sunday, August 18, 2002 7:16 PM Posted To: Exchange List Conversation: Time Sync Subject: RE: Time Sync So synch up with tick.usno.navy.mil. I think you can trust them to be secure. And, so what if you end up off by a fraction of a second? Exchange isn't exactly an astronomy application. Ed Crowley MCSE+Internet MVP kcCC+I Tech Consultant hp Services Protecting the world from PSTs and Bricked Backups! -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Paul Patti Sent: Thursday, August 15, 2002 1:46 PM To: Exchange Discussions Subject: RE: Time Sync Since windows time service is a SNTP client, and not a good on at that, It does not look at the "leap indicator" to check to see if the time server that is giving it time has been synced. windows time service also doesn't take inyo account the time it takes for the NTP packet to make the round trip. Also NTP4 uses SSL ant NTP v3 uses MD5. -----Original Message----- From: Chris Scharff [mailto:[EMAIL PROTECTED]] Sent: Thursday, August 15, 2002 4:38 PM To: Exchange Discussions Subject: RE: Time Sync ROFLMAO Since Datum appears to be NTGPv4 experts, can you expand on how my Windows Time Client isn't secure? > -----Original Message----- > From: Ryan Malayter [mailto:[EMAIL PROTECTED]] > Sent: Thursday, August 15, 2002 3:34 PM > To: Exchange Discussions > Subject: RE: Time Sync > > Wait a minute... After checking, I see you work for a company that > produces secure NTPv4 servers. Why are you asking us? Is this a market > survey? > > -----Original Message----- > From: Paul Patti [mailto:[EMAIL PROTECTED]] > Posted At: Thursday, August 15, 2002 2:56 PM > Posted To: Exchange List > Conversation: Time Sync > Subject: RE: Time Sync > > > The problem is that the Windows Time Service is a SNTP client. Besides > being not a very accurate client, it isn't secure. I was thinking > about a NTP v4 > client because of the security features. > > Thanks > Paul > > -----Original Message----- > From: Ryan Malayter [mailto:[EMAIL PROTECTED]] > Sent: Thursday, August 15, 2002 3:51 PM > To: Exchange Discussions > Cc: [EMAIL PROTECTED] > Subject: RE: Time Sync > > > The windows 2000 time service does this automatically. Just run > net time /setsntp:time.berkeley.netdot.net > on the Windows 2000 domain controller you installed first, and then > restart the Windows Time service. All other windows 2000/XP machines > in your domain will eventually (within a day or so) get the time from > it, and keep in sync. > > The internet host in the command above is a stratum-2 time server in > your general area. A list of these stratum-2 public time servers can > be found at http://www.eecis.udel.edu/~mills/ntp/clock2.htm. Your ISP > may or may not have an NTP server, and it may or may not be reliable, > you might want to give them a call to find out. > > If you've got NT4 and Win9x clients out there, see the great info at > http://www.ultratech-llc.com/KB/?File=/timesync.txt for info on > syncing their clocks. > > HTH, > -ryan- > > > -----Original Message----- > From: Paul Patti [mailto:[EMAIL PROTECTED]] > Posted At: Thursday, August 15, 2002 1:05 PM > Posted To: Exchange List > Conversation: Time Sync > Subject: Time Sync > > > Hi everyone, > > What is everyone using to sync the time on servers and workstations? > > Thanks > Paul > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Archives: http://www.swynk.com/sitesearch/search.asp > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Archives: http://www.swynk.com/sitesearch/search.asp > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Archives: http://www.swynk.com/sitesearch/search.asp > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
