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Aug 25, 2025
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Repo sync #40018

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22 changes: 20 additions & 2 deletions ...uring-settings/configuring-network-settings/configuring-time-synchronization.md
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Expand Up @@ -21,13 +21,31 @@ topics:
- Networking
shortTitle: Configure time settings
---

## Default NTP servers

We recommend configuring your own preferred NTP servers. The default NTP server values on GitHub Enterprise Server are the following:

{% ifversion ghes > 3.17 %}
AWS
* Primary Server: 169.254.169.123 prefer iburst minpoll 4 maxpoll 4
* NTP Pool: time.aws.com iburst

Other (non-AWS)
{% endif %}
* Primary Server: 0.github.pool.ntp.org
* Secondary Server: 1.github.pool.ntp.org

You must ensure that the NTP servers (configured or default) are reachable on UDP port 123. For more details on the network ports that need to be open, see [AUTOTITLE](/admin/configuring-settings/configuring-network-settings/network-ports#administrative-ports).

## Changing the default NTP servers

{% data reusables.enterprise_site_admin_settings.access-settings %}
{% data reusables.enterprise_site_admin_settings.management-console %}
1. In the "Settings" sidebar, click **Time**.
1. Under "Primary NTP server," type the hostname of the primary NTP server.
1. Under "Secondary NTP server," type the hostname of the secondary NTP server.
1. Under "Primary NTP server", type the hostname of the primary NTP server.
1. Under "Secondary NTP server (optional)", type the hostname of the secondary NTP server.{% ifversion ghes > 3.17 %}
1. Under "NTP pool (optional)", type the NTP pool.{% endif %}
1. Under the "Settings" sidebar, click **Save settings**.
1. Wait for the configuration run to complete.

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