I suggest adding the following doc to the end of chapter "5.6.
DNS" (after the paragraphs about forwarders):

Any host is permitted to issue recursive queries against configured
forwarders by default. When required, this behavior can be changed
in /etc/named.conf in "allow-recursion" statement. Please consult name
server documentation for details how to edit the configuration
statement.

----
How to test:
1) install IPA with --setup-dns and defined --forwarder
2) query record not-managed by installed IPA (e.g. www.freeipa.org) from
localhost - should pass both with and without the patch
3) query record not-managed by installed IPA from other computer from
different subnet - fails without the patch and should pass with the
patch

----
Update name server configuration file to allow any host to issue
recursive queries (allow-recursion statement).

https://fedorahosted.org/freeipa/ticket/1335

>From 3dd16fab887d70675bf6359b0afdf2d32932b911 Mon Sep 17 00:00:00 2001
From: Martin Kosek <mko...@redhat.com>
Date: Wed, 22 Jun 2011 08:35:50 +0200
Subject: [PATCH] Allow recursion by default

Update name server configuration file to allow any host to issue
recursive queries (allow-recursion statement).

https://fedorahosted.org/freeipa/ticket/1335
---
 install/share/bind.named.conf.template |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/install/share/bind.named.conf.template b/install/share/bind.named.conf.template
index 71facbaf7f3e14f009b2aa9d6ba7a5d8bd0372af..e843b4c005cbbbee55a2f9ef5374a6a3f12dbfca 100644
--- a/install/share/bind.named.conf.template
+++ b/install/share/bind.named.conf.template
@@ -11,6 +11,9 @@ options {
 	forward first;
 	forwarders {$FORWARDERS};
 
+	// Any host is permitted to issue recursive queries
+	allow-recursion { any; };
+
 	tkey-gssapi-credential "DNS/$FQDN";
 	tkey-domain "$REALM";
 };
-- 
1.7.5.4

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