If you use Linux, then netlink is required for IPv6-in-IPv4 support in ESP, AFAIK.

/Mikael

On 01/29/2013 06:18 PM, Jay Sharma wrote:
Hi Andreas,

Thanks for your reply. I checked the example scenarios but it does not list any case with IPv6-in-IPv4 for PFKEY.

My setup is similar to the one here -
http://www.strongswan.org/uml/testresults45/ipv6/net2net-ip6-in-ip4-ikev2/index.html [except that I do not have "bob" and there is a sit tunnel between alice and moon].

So, does charon (strongswan 4.5.1) support PF_KEY messages for IPv6-in-IPv4 environment? The moment I re-configure strongswan without --enable-kernel-pfkey, the traffic goes through fine.

Thanks,
Jay

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