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--- linux_wiki:synchronize_time_using_other_ntp_peers [2016/10/08 17:41]
billdozor
+++ linux_wiki:synchronize_time_using_other_ntp_peers [2018/04/20 11:27]
billdozor [NTP: Client Peering]
@@ Line 5: / Line 5: @@
 Synchronizing time to a central time server and also keeping in sync with a peer server.
-This type of setup would be a tier two NTP setup, allowing for redundancy if the central source of time is lost. The two peers could agree on a time and provide it locally to other servers.
+This type of setup is a tier two NTP setup, allowing for redundancy if the central source of time is lost. The two peers then agree on a time and provide it locally to other servers.
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@@ Line 18: / Line 18: @@
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-====== NTP: Time Server ======
+====== NTP: Central Time Server ======
 Setting up the "central time server" to allow the other servers to sync to it.
   * Server: ipa.example.com (192.168.1.152)
+    * This server should already have ntpd installed and working if FreeIPA has been setup.
 \\
@@ Line 67: / Line 68: @@
 # On server2: Peer with server1
 peer 192.168.1.150
+</code>
+\\
+Ensure that the firewall allows NTP in (on both server1 and server2)
+<code bash>
+firewall-cmd --permanent --add-service=ntp
+firewall-cmd --reload
 </code>
@@ Line 86: / Line 94: @@
 chronyc sources -v
 </code>
+  * Note: It may take a few minutes for the servers to enter a synced state.
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