documentation_complete: true


title: 'Specify a Remote NTP Server'

description: |-
    To specify a remote NTP server for time synchronization, edit
    the file <tt>/etc/ntp.conf</tt>. Add or correct the following lines,
    substituting the IP or hostname of a remote NTP server for <em>ntpserver</em>:
    <pre>server <i>ntpserver</i></pre>
    This instructs the NTP software to contact that remote server to obtain time
    data.

rationale: |-
    Synchronizing with an NTP server makes it possible
    to collate system logs from multiple sources or correlate computer events with
    real time events.

severity: medium

identifiers:
    cce@rhel8: CCE-86508-9
    cce@sle12: CCE-91661-9
    cce@sle15: CCE-91298-0

references:
    cis-csc: 1,14,15,16,3,5,6
    cis@sle12: 2.2.1.4
    cobit5: APO11.04,BAI03.05,DSS05.04,DSS05.07,MEA02.01
    isa-62443-2009: 4.3.3.3.9,4.3.3.5.8,4.3.4.4.7,4.4.2.1,4.4.2.2,4.4.2.4
    isa-62443-2013: 'SR 2.10,SR 2.11,SR 2.12,SR 2.8,SR 2.9'
    iso27001-2013: A.12.4.1,A.12.4.2,A.12.4.3,A.12.4.4,A.12.7.1
    nist: CM-6(a),AU-8(1)(a)
    nist-csf: PR.PT-1
    pcidss: Req-10.4.1,Req-10.4.3

ocil_clause: 'this is not the case'

ocil: |-
    To verify that a remote NTP service is configured for time synchronization,
    open the following file:
    <pre>/etc/ntp.conf</pre>
    In the file, there should be a section similar to the following:
    <pre>server <i>ntpserver</i></pre>

platform: package[ntp]
