VPN between site to site

[AEF]

hello, 

I want juste to teste VPN between LAn and WAN like the attached file, can I do this ? 

the real problem for me is : - the vpn site to site IPSEC does not work, I followed this tutoriel

http://www.youtube.com/watch?v=xltPuIZT9uU

Thank you in advance for your help.