--- a/sys/netinet6/in6_proto.c
+++ b/sys/netinet6/in6_proto.c
@@ -396,7 +396,7 @@
 VNET_DEFINE(int, ip6_sendredirects) = IPV6_SENDREDIRECTS;
 VNET_DEFINE(int, ip6_defhlim) = IPV6_DEFHLIM;
 VNET_DEFINE(int, ip6_defmcasthlim) = IPV6_DEFAULT_MULTICAST_HOPS;
-VNET_DEFINE(int, ip6_accept_rtadv) = 0;
+VNET_DEFINE(int, ip6_accept_rtadv) = 1;
 VNET_DEFINE(int, ip6_no_radr) = 0;
 VNET_DEFINE(int, ip6_norbit_raif) = 0;
 VNET_DEFINE(int, ip6_rfc6204w3) = 0;
@@ -412,7 +412,7 @@
 VNET_DEFINE(int, ip6_rr_prune) = 5;	/* router renumbering prefix
 					 * walk list every 5 sec. */
 VNET_DEFINE(int, ip6_mcast_pmtu) = 0;	/* enable pMTU discovery for multicast? */
-VNET_DEFINE(int, ip6_v6only) = 1;
+VNET_DEFINE(int, ip6_v6only) = 0;
 
 VNET_DEFINE(int, ip6_keepfaith) = 0;
 VNET_DEFINE(time_t, ip6_log_time) = (time_t)0L;