From 1190fff60836cc6c03b04fd04808b8073efdc830 Mon Sep 17 00:00:00 2001 From: Hao Jiang <45571951+jianghao0718@users.noreply.github.com> Date: Tue, 26 Aug 2025 04:54:02 +0900 Subject: [PATCH] Update NTP server configuration instructions (#56998) Co-authored-by: Felicity Chapman --- .../configuring-time-synchronization.md | 22 +++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/content/admin/configuring-settings/configuring-network-settings/configuring-time-synchronization.md b/content/admin/configuring-settings/configuring-network-settings/configuring-time-synchronization.md index 33cc6ff35767..3d1b7be2c2ac 100644 --- a/content/admin/configuring-settings/configuring-network-settings/configuring-time-synchronization.md +++ b/content/admin/configuring-settings/configuring-network-settings/configuring-time-synchronization.md @@ -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.