[CentOS] ipsec with ipv4 and ipv6 not working

[Drew]

> I have posted to the ipsec-devel list and haven't gotten any responses. Also I
> have spent 2 days googling with
> no results about the above setup. Is it even possible to tunnel ipv4 packet thru
> an ipv6 ipsec tunnel?

AFAIK, No.

IPv4 & IPv6 are different protocols so if you want to move IPv6
traffic over a IPv4 IPSEC tunnel you need to encapsulate the IPv6
payload within IPv4 packets. The reverse is also true of IPv4 over
IPv6.

This is why tunnel brokers like Freenet6 & Teredo exist, you can't
push IPv6 traffic out across an IPv4 only network without tunneling.


-- 
Drew

"Nothing in life is to be feared. It is only to be understood."
--Marie Curie