Date: Fri, 5 Jul 2002 22:44:06 -0600 From: "David G . Andersen" <danderse@cs.utah.edu> To: Ross Wheeler <rossw@albury.net.au> Cc: twig les <twigles@yahoo.com>, Brian Reichert <reichert@numachi.com>, Kim Okasawa <kimokasawa@hotmail.com>, _@r4k.net, freebsd-security@FreeBSD.ORG Subject: Re: NTP security - (was Any security issues with root's cron job?) Message-ID: <20020705224406.B23004@cs.utah.edu> In-Reply-To: <Pine.BSF.4.31.0207061350010.24921-100000@giroc.albury.net.au>; from rossw@albury.net.au on Sat, Jul 06, 2002 at 01:52:13PM %2B1000 References: <20020706032916.35363.qmail@web10105.mail.yahoo.com> <Pine.BSF.4.31.0207061350010.24921-100000@giroc.albury.net.au>
next in thread | previous in thread | raw e-mail | index | archive | help
Ross Wheeler just mooed: > > Whip over to ebay, buy a cheap second-hand GPS and cable, stick it into > one of your servers and presto - instant "stratum 1" time reference for One thing to note with this approach is that you have to pick your GPS carefully. Hand-helds often have really terrible time output; a friend of mine used his PCMCIA GPS and was getting worse-than-NTP time from it. If you can find it, look for a model that's optimized for time synch. Trimble, UT+, etc. There's a good list of them in the NTP faq at http://www.ntp.org/ > under a hundred bucks. Under your control (I can't see anyone taking over > or DoSing the whole of the GPS network any time soon, do you?) Certainly not to attack one internet site, at least. :) -Dave -- work: dga@lcs.mit.edu me: dga@pobox.com MIT Laboratory for Computer Science http://www.angio.net/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020705224406.B23004>