Index: sys/netpfil/pf/pf_if.c
===================================================================
--- sys/netpfil/pf/pf_if.c
+++ sys/netpfil/pf/pf_if.c
@@ -130,18 +130,20 @@
 		pfi_attach_ifnet(ifp);
 	IFNET_RUNLOCK();
 
-	pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event,
-	    pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
-	pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event,
-	    pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
-	pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event,
-	    pfi_attach_group_event, curvnet, EVENTHANDLER_PRI_ANY);
-	pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event,
-	    pfi_change_group_event, curvnet, EVENTHANDLER_PRI_ANY);
-	pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event,
-	    pfi_detach_group_event, curvnet, EVENTHANDLER_PRI_ANY);
-	pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event,
-	    pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY);
+	if (IS_DEFAULT_VNET(curvnet)) {
+	    pfi_attach_cookie = EVENTHANDLER_REGISTER(ifnet_arrival_event,
+		pfi_attach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
+	    pfi_detach_cookie = EVENTHANDLER_REGISTER(ifnet_departure_event,
+		pfi_detach_ifnet_event, NULL, EVENTHANDLER_PRI_ANY);
+	    pfi_attach_group_cookie = EVENTHANDLER_REGISTER(group_attach_event,
+		pfi_attach_group_event, curvnet, EVENTHANDLER_PRI_ANY);
+	    pfi_change_group_cookie = EVENTHANDLER_REGISTER(group_change_event,
+		pfi_change_group_event, curvnet, EVENTHANDLER_PRI_ANY);
+	    pfi_detach_group_cookie = EVENTHANDLER_REGISTER(group_detach_event,
+		pfi_detach_group_event, curvnet, EVENTHANDLER_PRI_ANY);
+	    pfi_ifaddr_event_cookie = EVENTHANDLER_REGISTER(ifaddr_event,
+		pfi_ifaddr_event, NULL, EVENTHANDLER_PRI_ANY);
+	}
 }
 
 void