Server
In the pull-down Select list (see Figure 27.2, “YaST: NTP Server” (page 459), de-
termine whether to set up time synchronization using a time server from your local
network (Local NTP Server) or an Internet-based time server that takes care of
your time zone (Public NTP Server). For a local time server, click Lookup to start
an SLP query for available time servers in your network. Select the most suitable
time server from the list of search results and exit the dialog with OK. For a public
time server, select your country (time zone) and a suitable server from the list under
Public NTP Server then exit the dialog with OK. In the main dialog, test the avail-
ability of the selected server with Test.
Another dialog enables you to select an NTP server. Activate Use for Initial Syn-
chronization to trigger the synchronization of the time information between the
server and the client when the system is booted. Options allows you to specify ad-
ditional options for ntpd.
Using Access Control Options, you can restrict the actions that the remote computer
can perform with the daemon running on your computer. This eld is enabled only
after checking Restrict NTP Service to Congured Servers Only on the Security
Settings tab (see Figure 27.3, “Advanced NTP Conguration: Security Settings”
(page 461)). The options correspond to the restrict clauses in /etc/ntp
.conf. For example, nomodify notrap noquery disallows the server to
modify NTP settings of your computer and to use the trap facility (a remote event
logging feature) of your NTP daemon. Using these restrictions is recommended
for servers out of your control (for example, on the Internet).
Refer to /usr/share/doc/packages/ntp-doc (part of the ntp-doc
package) for detailed information.
Peer
A peer is a machine to which a symmetric relationship is established: it acts both
as a time server and as a client. To use a peer in the same network instead of a
server, enter the address of the system. The rest of the dialog is identical to the
Server dialog.
Radio Clock
To use a radio clock in your system for the time synchronization, enter the clock
type, unit number, device name, and other options in this dialog. Click Driver
Calibration to ne-tune the driver. Detailed information about the operation of a
460 Reference
