On 13 Jan 2014, at 04:13, Supratik Goswami <[email protected]> wrote:

> Hi 
> 
> I am using multiple AWS accounts for production/test environments, each
> environment is running a VPC. I have configured Amazon VPC VPN connections
> in each of the VPC. There is a another AWS account in which I have configured
> StrongSwan in EC2 instance.
> 
> I am able to create the IPSec tunnels from the StrongSwan instance to the 
> other
> VPC VPN tunnels. When I check the "status" of the tunnels it shows all 
> established.
> 
> When I try to ping from the EC2 instance (running StrongSwan) to any EC2 
> instance
> running in the other VPC it fails but when I ping from the other end I am 
> able to 
> see the ICMP requests from the tcpdump but reply is not reaching back to 
> those instances.
> 
> Below is my ipsec.conf configuration.
> 
> conn %default
>       keyexchange=ikev1
>       keyingtries=%forever
>       esp=aes128-sha1-modp1024
>       ike=aes128-sha1-modp1024
>       ikelifetime=8h
>       auto=start
>       authby=secret
>       dpdaction=restart
>       closeaction=restart
>       dpddelay=10s
>       dpdtimeout=30s
>       leftsubnet=0.0.0.0/0
>       installpolicy=no
> 
> conn VPC-CUST-GW1
>       left=10.255.0.5
>       right=72.21.209.194
>       rightsubnet=10.21.0.0/16
>       leftfirewall=yes
> 
> conn VPC-CUST-GW2
>       left=10.255.0.5
>       right=72.21.209.226
>       rightsubnet=10.21.0.0/16
>       leftfirewall=yes
> 
> conn VPC-CUST-GW3
>       left=10.255.0.127
>       right=72.21.209.192
>       rightsubnet=10.30.0.0/16
>       leftfirewall=yes
> 
> conn VPC-CUST-GW4
>         left=10.255.0.127
>         right=72.21.209.226
>       rightsubnet=10.30.0.0/16
>       leftfirewall=yes
> 
> Can anyone help me to figure out what I am missing here?
> 
> -- 
> Warm Regards
> 
> Supratik
> 

Hi Supratik,

Did you check on the documentation of strong swan?
http://wiki.strongswan.org/projects/strongswan/wiki/AwsVpc

Thanks,
Pawel

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