Merge pull request #30086 from skrthomas/BZ1867205

BZ1867205: clarification

Author: bmcelvee

modules/nw-dns-forward.adoc

@@ -5,7 +5,7 @@
 [id="nw-dns-forward_{context}"]
 = Using DNS forwarding
 
-You can use DNS forwarding to override the forwarding configuration identified in `/etc/resolv.conf` on a per-zone basis by specifying which name server should be used for a given zone.
+You can use DNS forwarding to override the forwarding configuration identified in `/etc/resolv.conf` on a per-zone basis by specifying which name server should be used for a given zone. If the forwarded zone is the Ingress domain managed by {product-title}, then the upstream name server must be authorized for the domain.
 
 .Procedure