another four IPv6 scenarios fully demonstrate ip6tables firewall use

testing/tests/ipv6/rw-ikev1/pretest.dat

@@ -1,5 +1,7 @@
-moon::echo "1" >/proc/sys/net/ipv6/conf/all/forwarding
+moon::/etc/init.d/iptables start 2> /dev/null
+carol::/etc/init.d/iptables start 2> /dev/null
 alice::"ip route add fec0:\:/16 via fec1:\:1"
+carol::"ip route add fec1:\:/16 via fec0:\:1"
 carol::ipsec start
 moon::ipsec start
 carol::sleep 2