OSDOCS-13138: adds firewall rules for IPv6 listen address MicroShift

Author: ShaunaDiaz

modules/microshift-firewall-allow-traffic.adoc

@@ -32,3 +32,10 @@ $ sudo firewall-offline-cmd --permanent --zone=trusted --add-source=<custom IP r
 ----
 $ sudo firewall-offline-cmd --permanent --zone=trusted --add-source=169.254.169.1
 ----
+
+. If you are using a load balancer, allow the IPv6 traffic through the firewall by running the following command:
++
+[source,terminal]
+----
+$ sudo firewall-cmd --permanent --zone=trusted --add-source=fd01::/48
+----

modules/microshift-firewall-apply-settings.adoc

@@ -11,7 +11,7 @@ To apply firewall settings, use the following one-step procedure:
 .Procedure
 
 * After you have finished configuring network access through the firewall, run the following command to restart the firewall and apply the settings:
-
++
 [source,terminal]
 ----
 $ sudo firewall-cmd --reload