3529. [func] Named now listens on both IPv4 and IPv6 interfaces

                        by default.  Named previously only listened on IPv4
                        interfaces by default unless named was running in
                        IPv6 only mode.  [RT #32945]

CHANGES

+3529.	[func]		Named now listens on both IPv4 and IPv6 interfaces
+			by default.  Named previously only listened on IPv4
+			interfaces by default unless named was running in
+			IPv6 only mode.  [RT #32945]
+
 3528.	[func]		New "dnssec-coverage" command scans the timing
 			metadata for a set of DNSSEC keys and reports if a
 			lapse in signing coverage has been scheduled

README

@@ -51,6 +51,10 @@ BIND 9
         For up-to-date release notes and errata, see
         http://www.isc.org/software/bind9/releasenotes
 
+BIND 9.10.0
+
+	Named now listens on both IPv4 and IPv6 interfaces by default.
+
 BIND 9.9.0
 
 	BIND 9.9.0 includes a number of changes from BIND 9.8 and earlier

bin/named/config.c

@@ -71,7 +71,7 @@ options {\n\
 	host-statistics no;\n\
 	interface-interval 60;\n\
 	listen-on {any;};\n\
-	listen-on-v6 {none;};\n\
+	listen-on-v6 {any;};\n\
 	match-mapped-addresses no;\n\
 	max-rsa-exponent-size 0; /* no limit */\n\
 	memstatistics-file \"named.memstats\";\n\

bin/named/server.c

@@ -5300,13 +5300,11 @@ load_configuration(const char *filename, ns_server_t *server,
 						       ns_g_aclconfctx,
 						       ns_g_mctx, &listenon);
 		} else if (!ns_g_lwresdonly) {
-			isc_boolean_t enable;
 			/*
 			 * Not specified, use default.
 			 */
-			enable = ISC_TF(isc_net_probeipv4() != ISC_R_SUCCESS);
 			CHECK(ns_listenlist_default(ns_g_mctx, listen_port,
-						    enable, &listenon));
+						    ISC_TRUE, &listenon));
 		}
 		if (listenon != NULL) {
 			ns_interfacemgr_setlistenon6(server->interfacemgr,

doc/arm/Bv9ARM-book.xml

@@ -7719,8 +7719,8 @@ listen-on port 1234 { !1.2.3.4; 1.2/16; };
           <para>
             The <command>listen-on-v6</command> option is used to
             specify the interfaces and the ports on which the server will
-            listen
-            for incoming queries sent using IPv6.
+            listen for incoming queries sent using IPv6.  If not specified,
+            the server will listen on port 53 on all IPv6 interfaces.
           </para>
 
           <para>
@@ -7769,13 +7769,6 @@ listen-on-v6 port 1234 { !2001:db8::/32; any; };
 <programlisting>listen-on-v6 { none; };
 </programlisting>
 
-          <para>
-            If no <command>listen-on-v6</command> option is
-            specified, the server will not listen on any IPv6 address
-	    unless <command>-6</command> is specified when <command>named</command> is
-	    invoked.  If <command>-6</command> is specified then
-	    <command>named</command> will listen on port 53 on all IPv6 interfaces by default.
-          </para>
         </sect3>
 
         <sect3 id="query_address">