For leaving the pool this is a terrible idea.  Most/all SNTP clients will 
pickup the change quickly.  Ntpds won't by design -- not really the users 
fault.  Future ntpd versions will handle this better.

However: as a test tool this has great potential!  Set it up to run on a couple 
of IPs with logging and a log analyzer and it could be an (automated?) test 
tool for people implementing clients.

Does it deal appropriately with failures?  With KoD packets?  DNS caching...  
Etc etc.

-- 
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On Aug 19, 2010, at 6:30, folkert <[email protected]> wrote:

> Hi,
> 
> For people who left the NTP pool, it might be usefull to run
> http://www.vanheusden.com/time/jans/ for a while: it acts as a real NTP
> server but then returing random or constant or backticking time. People
> might then realise sooner that something is wrong (=they're using a no
> longer existing server).
> 
> 
> Folkert van Heusden
> 
> -- 
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