--- xinetd-2.3.14/xinetd/service.c.old	2007-05-16 15:33:41.000000000 +0200
+++ xinetd-2.3.14/xinetd/service.c	2007-05-16 15:29:53.000000000 +0200
@@ -335,6 +335,15 @@
 
    if ( SVC_FD(sp) == -1 )
    {
+      if (SC_BIND_ADDR(scp) == NULL && SC_IPV6( scp )) 
+      {
+         /* there was no bind address configured and IPv6 fails. Try IPv4 */
+         msg( LOG_NOTICE, func, "IPv6 socket creation failed for service %s, trying IPv4", SC_ID( scp ) ) ; 
+         M_CLEAR(SC_XFLAGS(scp), SF_IPV6);
+         M_SET(SC_XFLAGS(scp), SF_IPV4);
+         return svc_activate(sp);
+      }
+
       msg( LOG_ERR, func,
                   "socket creation failed (%m). service = %s", SC_ID( scp ) ) ;
       return( FAILED ) ;
--- xinetd-2.3.14/xinetd/confparse.c.old	2007-05-16 15:33:26.000000000 +0200
+++ xinetd-2.3.14/xinetd/confparse.c	2007-05-16 15:15:22.000000000 +0200
@@ -245,7 +245,7 @@
              M_SET(SC_XFLAGS(scp), SF_IPV6);
       }
       else
-         M_SET(SC_XFLAGS(scp), SF_IPV4);
+         M_SET(SC_XFLAGS(scp), SF_IPV6); /*try bind IPv6 by default*/
    }
 
    if (SC_ORIG_BIND_ADDR(scp))