Quoting Eric Nelson ([EMAIL PROTECTED]): > Here is what I use in crontab: > 59 * * * * /usr/sbin/ntpdate ntp-dec.usno.navy.mil >> /dev/null
The hostname is a CNAME for usno.pa-x.dec.com, operated by Compaq in Palo Alto for the U.S. Naval Observatory. It's a stratum 1 server. Posted access policy is "Access Policy: open access for stratum 2 servers, Compaq, others by arrangement." (http://tycho.usno.navy.mil/ntp.html) USNO states at the top of the listing at the top of the page: "All of the following stratum 1 NTP servers are open to stratum 2 servers within the same time zone and to others by arrangement." http://www.eecis.udel.edu/~mills/ntp/servers.html states: "Please respect the access policy as stated by the responsible person. It is very important that potential clients avoid use of servers not listed as open access, unless approved first by the responsible person. This especially includes indiscriminate use of servers not listed in the list, since this can be disruptive. The responsible person should always be notified upon establishment of regular operations with servers listed as open access. Servers listed as closed access should NOT be used without prior permission, since this may disrupt ongoing activities in which these servers are involved." That page clarifies about what is meant by a stratum 2 server: "The secondary server provides synchronization to a sizable population of other servers and clients on the order of 100 or more." (There's more.) It is not unknown for members of the general public who sync to statum 1 servers without prior arrangement to find their entire IP blocks blocked by the statum 1 server operator. On the bright side, doing the sort of periodic ntpdate you discuss is less likely to risk the wrath of a statum 1 server than would running ntpd against it -- as I've seen people urge on other mailing lists that I guess should go nameless. -- Cheers, "Don't use Outlook. Outlook is really just a security Rick Moen hole with a small e-mail client attached to it." [EMAIL PROTECTED] -- Brian Trosko in r.a.sf.w.r-j _______________________________________________ vox-tech mailing list [EMAIL PROTECTED] http://lists.lugod.org/mailman/listinfo/vox-tech
