Email - ntp.conf
Email Solution · Config document · referenced from Virtual machines and OS build
noteThe names of the two time servers did not survive anonymization and are placeholders here.
The configuration of ntpd, the time client on every server of the email system. It is the file of the operating system template with two server lines changed; every active line is shown, and most of the stock comments are left out.
| Item | Value |
|---|---|
| Path on the server | /etc/ntp.conf |
| Shown here | DC2-A-VCMSX001 |
| Also on | the other four servers of site 2, the same content |
| Time source according to the design | the Infoblox appliances of site 1, which serve DNS and NTP to both sites |
The file
driftfile /var/lib/ntp/drift # Permit time synchronization with our time source, but do not # permit the source to query or modify the service on this system. restrict default nomodify notrap nopeer noquery # Permit all access over the loopback interface. restrict 127.0.0.1 restrict ::1 # Time sources (this comment is mine; the stock one spoke of pool.ntp.org). server <NTP_SERVER_1> iburst server <NTP_SERVER_2> iburst includefile /etc/ntp/crypto/pw # Key file containing the keys and key identifiers used when operating # with symmetric key cryptography. keys /etc/ntp/keys # Disable the monitoring facility to prevent amplification attacks using ntpdc # monlist command when default restrict does not include the noquery flag. disable monitor
The files on the other four servers differ from this one only by a missing newline at the end.
Checked against RHEL 10.2
| As built | Today |
|---|---|
ntpd configured in /etc/ntp.conf | Gone. Since RHEL 8 "the NTP protocol is implemented only by the chronyd daemon" and "the ntp daemon is no longer available". The ntp package is not in the RHEL 10 package manifest; chrony 4.8 is |
| RHEL 7 | Maintenance ended on 2024-06-30; an extended life cycle add-on for RHEL 7.9 is available through 2029-05-31 |
The file cannot be carried over; the two server lines would be rewritten for chronyd.