[Gllug] xntp strangeness

[Simon A. Boggis]

On Sun, 2003-09-07 at 20:45, Dylan wrote:
> Much playing later had led me to the following state: If the machine serving 
> local time is rebooted, all clients can pick up the time from that server, 
> but if the server undergoes an rcxntpd restart then the clients can no longer 
> pick up the time.

Try seeing what state ntpd is in initially by doing:
  ntpdc -nls 
on your time-server (the gateway machine).

Try restarting it, and check that ntpd is still running (something
like):
  ps auxww | grep '[n]tpd'
... if it isn't running, dig in the logs to see why.
If it is running then have a look at 
  ntpdc -nls
again, and see what is different (if you try ntpdc when it isn't running
you'll get "connection refused" or some such).

If ntpd looks healthy on your gateway, even after restart, but clients
still can't see it, I'd start looking at firewall rules (especially any
changed dynamically at boot and rc.d script start).

My own home gateway machine looks something like:

$ ps auxww | grep '[n]tpd' 
root       503  0.0  1.0  1968 1960 ?        SL   Aug20   0:00
/usr/sbin/ntpd
$ ntpdc -nls
client    130.88.203.12
client    130.88.200.6
client    130.159.196.118
     remote           local      st poll reach  delay   offset    disp
=======================================================================
*130.88.203.12   aaa.bbb.ccc.ddd  2 1024  343 0.02036  0.000880 0.21202
.130.88.200.6    aaa.bbb.ccc.ddd  2 1024  377 0.02081  0.002226 0.01485
.130.159.196.118 aaa.bbb.ccc.ddd  2 1024  377 0.02498 -0.006240 0.01486

where aaa.bbb.ccc.ddd is my machine's IP address.

Simon

-- 
----------------------------------------------------------------------
Dr Simon A. Boggis                                  Systems Programmer
Department of Computer Science,                     Tel. 020 7882 7522
Queen Mary, University of London, London E1 4NS UK. 
---- GPG public key <http://www.dcs.qmul.ac.uk/~simon/#publickey> ----


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