[ntp:questions] Re: time.ucla.edu is closed

Steve Kostecke kostecke at ntp.isc.org
Wed Sep 6 00:48:04 UTC 2006

On 2006-09-05, Felix Tilley <fetilley at cyberbromo.int> wrote:

> On Mon, 04 Sep 2006 02:54:39 +0000, Danny Mayer wrote:
>> Where did you see that this system has public access? The notice
>> attached to the list for tick (time is a CNAME) shows the following:
>> AccessDetails: Open access to stratum-2 servers and to UCLA clients.
>> So why are you trying to access it?
> It is publically available.

This server has published the following access rules:

* The AccessPolicy of RestrictedAccess. That means that access is open
to clients who meet the published access conditions (e.g. AccessDetails,
ServiceArea, NotificationMessage, etc.).

* The AccessDetails state that it is open to stratum-2 servers and to
UCLA clients.

* The ServiceArea is restricted to the Pacific Time zone. Clients
outside of the ServiceArea may request access.

* Clients must send a NotificationMessage prior to using this server.

So ...

If you are a UCLA client and send a NotificationMessage you may use this

If you are a legitimate stratum-2 server, defined in the
RulesOfEngagement as one that is serving more than 100 clients, and
are in the published ServiceArea, or have permission, and send a
NotificationMessage, you may use this server.

Use of the server by clients who do not meet these conditions will most
likely be considered abuse. 

> My former employer put its time servers behind a firewall. I am
> accessing it to sync my computer clock. How do you you do it?

There are numerous Stratum-2 time servers listed at
http://ntp.isc.org/s2 and there's a good number of servers in the NTP
pool (http://ntp.isc.org/pool)

Steve Kostecke <kostecke at ntp.isc.org>
NTP Public Services Project - http://ntp.isc.org/

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