Hi,
I would like to realize something like the following article promise to explain, but it is unfinished:
http://wiki.mikrotik.com/wiki/Routing_through_remote_network_over_IPsec
The differences are that I want to access only one ip through vpn from the second site (home in the article), and that in the first site (data center), there are two wan connections (wan1, and wan2). In the “data center” I can access that IP through the specific wan connection with a simple route setting. The vpn goes through wan1, and I route packets through wan2 for the spec. IP.
I have a working Ipsec tunnel between the “data center” (wan1) and “home” (wan3).