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Installation and Configuration
52 EncrypTight User Guide
2 Replace the defaults with your preferred time server. You can specify multiple time servers and use
either IPv4 or IPv6 addresses. For example, the new section should look similar to the following:
# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server 192.168.2.22
3 Save and close the file.
4 To set up the NTP daemon to start every time the server starts, at the command line, type:
chkconfig ntpd on
Changes to the NTP settings do not take affect until you restart the NTP daemon or the entire server.
To restart the NTP daemon:
1 At the command line, type:
service ntpd restart
To check the time source connection status:
1 At the command line, type:
ntpq -p
The result of this command should be similar to the following:
The fields described in Table 11 can help you determine if there is a time sync problem.
The ETKMS server may initially report as unsynchronized. The synchronization may take several
minutes. After multiple attempts, if the output of the ntpq -p command continues to indicate a time
synchronization problem check the following:
● Verify that the NTP server IP address is a valid address
● If you are using a local NTP server, check to see if the NTP server is powered on
● Check for network problems that may prevent the ETKMS from reaching the NTP server
remote refid st t when poll reach delay offset jitter
==============================================================================
*ns.unc.edu 129.6.15.28 2 u 222 512 37 25.160 -173753 83.394
Table 11 ntpq -p command output
Field Description
remote IP address of the NTP server.
st (stratum) A stratum value of 16 indicates a time synchronization failure.
when Number of seconds since the last poll. This value should be less than or equal to
the poll value. A “when” value that exceeds the “poll” value indicates a time sync
problem.
poll Polling interval in seconds. The “poll” value will be greater than the “when” value
when the time server is synchronizing successfully.
jitter A value of 4000.00 indicates a time synchronization failure.