I have followed the steps of the KB and the VPN connection come up correctly (with a simple PSK); if I try to connect with HTTP or POP3 to 192.168.1.253 (web server) all works fine but there are some problems
* no access to SAMBA server (same server of web and mail)
* usage of SMTP server is blocked like the request comes from outside of the LAN (because the relay is allowed on Postfix only for the clients on LAN)
I thought that a VPN creates a tunnel and all the requests form the VPN's client are processed like requests of LAN's clients...
For example ip-address.com shows the WAN's IP of my home router not the WAN's IP of VPN's router; I thought that the packets flows first to VPN's router and not directly to Internet.
Sorry for my English and thanks for help.