openvpn tunnel for complete home network

[brec 0]

Hello, i have some troubles while implementing my idea. 

 

I have some client in my homenetwork. For example a Tablet, Smartphone and a Computer. I call all these "Client X". Then i have a Fritzbox-Device. It's my Router and it established the connection to the internet. And then i have a Ubuntu-Server.

 

Instantly Client X is connected directly to the router. I have a internet connection over my real IP address. My plan is to bypass the complete network traffic over my ubuntu server. this is no problem till now. i change the gateway address to the servers address. the server hast ip forwarding enabled and has a router to the real ip. everything works fine... TILL NOW!

 

When is start OpenVPN client at the server i cant establish any kind of connection by client x. when i make a traceroute its hanging up after the server ip. but at the server openvpn works :/

 

PLEASE HELP ME thanks a lot