Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

Appendix B: Setting Up Network Time Protocol
Configuring NTP on a Sidewinder G2
Using command
line:
Using the Admin
Console:
598
2 Enable the NTP server in the appropriate burbs, as follows:
a Select Services Configuration > Servers, and select NTP from the
Server List. The NTP Control tab appears.
b Select the check box for the burbs in which you want NTP enabled.
c Click the Save icon in the toolbar.
3 At the command line, do the following:
a Connect to the Sidewinder G2 and enter the srole command.
b Select the machine(s) from which the Sidewinder G2 will receive time by
entering the following command:
cf ntp add server burb=server_burb ip=NTPserver_ip_addr
4 [Optional] Configure the appropriate NTP rules using the following format:
cf ntp add restrict burb=burb_name ip=restricted_ip_
address_or_subnet mask=network_mask_for_ip_address
flags=comma_separated_lists_of_flags: notrust, noquery,
etc.
Note: Flags are used to restrict the NTP functions of a server, peer, or client.
Refer to man cf_ntp for details.
As an NTP client, synchronization to the server clock will occur at a rate of
seconds per hour. That is, a difference of several minutes between the server
clock and the client clock may take several days to synchronize.
Configuring the Sidewinder G2 as an NTP server
Follow the steps below to set up the Sidewinder G2 as an NTP server to send
the time to other systems. Note the following:
• This section assumes the same configuration as shown in Figure 236. It
also assumes you have already set up the Sidewinder G2 as a client on the
external burb to receive the time-feed from an external time server.
• If you are setting up NTP to provide time to your network from another
network, and there is a router between that network and your network,
make sure the router allows NTP traffic.
1 Disable the fixclock server, as follows (you must disable fixclock before you
enable NTP):
a In the Admin Console, select Services Configuration > Servers, and
select fixclock from the Server List. The fixclock Control tab appears.
b Select the Disable radio button.
c Click the Save icon in the toolbar.