Jon, Are you sure you have read
http://en.wikipedia.org/wiki/NTP_vandalism and understand the possible consequences of your design choice? Are you sure you have a way to access and reconfigure all devices in case your SNTP implementation starts vandalicing NIST servers? Setting up your own stratum-2 server - that syncs with NIST and whoever - and coding your servers ip into the devices, is a cheap insurance in case your device start abusing the time service. Your solution is known - and disregarded - by everyone on this list. Your problem is not the chance that NIST, USNO or anyone else chose to change their ip adresses. Your problem is the chance your devices have a firmware bug! Would it be a terrorist crime to mess with the time infrastructure in the US these days? What is the chance to be sued by the time server operator? How much is the loss of reputation for your company worth? br, Björn On Wed, July 19, 2006 20:19, Jon Tandy said: > Thank you to those who responded to my question. I've found what I think > is > a solution to my issue. The NIST publicly lists IP addresses for several > time servers, which leads me to believe they should remain relatively > stable. I know it's not guaranteed, but it should hopefully be relatively > consistent. I'm passing it along in case you receive any future requests > for such thing. > > http://tf.nist.gov/service/time-servers.html > > > Jon Tandy > > > -----Original Message----- > From: Jon Tandy [mailto:[EMAIL PROTECTED] > Sent: Friday, July 14, 2006 5:38 PM > To: '[email protected]' > Subject: Fixed IP addresses for SNTP > > > Hello, > > We have some embedded devices which require time synchronization using > SNTP, > but which presently do not have the ability to use a named DNS server > address. Are there any known public, fixed IP sources which would be > available for end users, which are not likely to change IP addresses? > > Thanks, > > Jon Tandy > Project Engineer > 7500 West 161st Street > Overland Park, KS 66085 > Ph. 1-913-549-1000 ext. 232 > Fax 1-913-549-1001 > [EMAIL PROTECTED] > http://www.arcom.com <http://www.arcom.com/> > > > > > _____________________________________________________________________ > The message in this transmission is sent in confidence for the attention > of the addressee only and should not be disclosed to any other party. > Unauthorised recipients are requested to preserve this confidentiality. > Please advise the sender if the addressee is not resident at the receiving > end. Email to and from Arcom is automatically monitored for operational > and lawful business reasons. > > This message has been virus scanned by > MessageLabs._______________________________________________ > timekeepers mailing list > [email protected] > https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers > _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
