EndRun Tempus LX GPS, User Manual

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T e m p u s L X G P S U s e r M a n u a l 28
C H A P T E R F O U R
29 T e m p u s L X G P S U s e r M a n u a l
S E T T I N G U P N T P C L I E N T S O N W I N D O W S N T 4 . 0 / 2 0 0 0 / X P
• You have installed NTP on your client computer.
• You have successfully performed the
MD5 Authenticated NTP Client Setup
on your client com-
puter, if you plan to use MD5 authentication.
Configure NTP
You must edit the ntp.conf file which
ntpd.exe
, the NTP daemon, looks for by default in the the
\winnt\system32\drivers\etc
directory or, for XP, the
\windows\system32\drivers\etc
directory. As-
suming that your Tempus LX server has been configured to use key 2 for broadcast authentication as
shown in the example in chapter 2, make sure that key 2 is included in the
trustedkey
line, and add
this line to the end of the ntp.conf file:
broadcastclient
If you are not using MD5 authentication, you would add these lines:
disable auth
broadcastclient
If you are using multicast instead of broadcast mode, you would replace the
broadcastclient
keyword with the
multicastclient
keyword. You may remove the line added previously in
Basic
NTP Client Setup :
server 192.168.1.245
or the authenticated version added in
MD5 Authenticated NTP Client Setup
:
server 192.168.1.245 key 1
Re-start
ntpd.exe
to have it begin using the Tempus LX as a broadcast or multicast server. By de-
fault, the NTP installation program installs
ntpd.exe
as a service called Network Time Protocol, and
starts it. You must use the Services utility in Control Panel to stop the Network Time Protocol service
and then re-start it.
Use the NTP utility
ntpq.exe
to check that
ntpd.exe
is able to communicate with the Tempus LX.
By default it is installed in the
\Program Files\Network Time Protocol
sub-directory of your Windows
NT/2000/XP partition. After issuing the command
ntpq
you will see the
ntpq.exe
command prompt:
ntpq>
Use the command
peers
to display the NTP peers which your computer is using. One of them should be the Tempus LX
server which you have just configured. You should verify that it is being ‘reached’. (You may have
to continue issuing the peers command for a minute or two before you will see the ‘reach’ count
increment.)