[strongSwan] Ping is not working after establishing a tunnel in strongswan

[SaRaVanAn]

Hi all,

*Topology*
+++++++
     eth0                 eth0 eth1      VPN tunnel   eth1

Pc1 ---------------- -------GW  ------------------------------  VPN server
172.31.114.230             172.31.114.231 50.1.1.239
50.1.1.227

I have established a VPN tunnel between GW and VPN server using Strongswan.
After I established the tunnel the GW is not reachable from PC1 and ping
fails. I have seen ARP requests in eth0 of GW, but its not replying for
that. But if the tunnel is not there , ping is working fine. Please find my
SPD rules below and let me know the reason for ping getting dropped.

   0.0.0.0/0[any] 50.1.1.239[any] any
   fwd prio high + 1073739901 ipsec
   esp/tunnel/50.1.1.227-50.1.1.239/unique:1
   created: Apr 12 00:38:26 2012  lastused:
   lifetime: 0(s) validtime: 0(s)
   spid=1378 seq=1 pid=23592
   refcnt=1

0.0.0.0/0[any] 50.1.1.239[any] any
   in prio high + 1073739901 ipsec
   esp/tunnel/50.1.1.227-50.1.1.239/unique:1
   created: Apr 12 00:38:26 2012  lastused:
   lifetime: 0(s) validtime: 0(s)
   spid=1368 seq=2 pid=23592
   refcnt=1
50.1.1.239[any] 0.0.0.0/0[any] any
   out prio high + 1073739901 ipsec
   esp/tunnel/50.1.1.239-50.1.1.227/unique:1
   created: Apr 12 00:38:26 2012  lastused:
   lifetime: 0(s) validtime: 0(s)
   spid=1361 seq=3 pid=23592
   refcnt=1

Regards,
Saravanan N
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