[strongSwan] net-net sample can not work on ubuntu14.04

[zhuyj]

Hi, all

I followed this link: 
http://www.strongswan.org/uml/testresults/ikev2/net2net-psk/

I configured 4 vmare hosts. The hosts are ubuntu14.04.

The network topology is as below.

10.1.0.10 <---->10.1.0.1 (moon) 192.168.0.1<----->192.168.0.2 (sun) 
10.2.0.1<---->10.2.0.10

strongswan is 5.1.2.

 From this link: 
http://www.strongswan.org/uml/testresults/ikev2/net2net-psk/, after a 
vpn tunnel is created,
I ran "ping 10.2.0.10" on clinet 10.1.0.10. But I can not get any reply 
from 10.2.0.10.

I can find the icmp packets into moon. But moon will not forward these 
icmp packets.

I exactly followed this link 
http://www.strongswan.org/uml/testresults/ikev2/net2net-psk/, but I can 
not get
the same test result with this link.

Does any one have the similar experience?

Any reply is appreciated.

Thanks a lot.
Zhu Yanjun