@Virgo 

Hi,

Thank you for your reply.

No luck with that solution. :(

I achive a connected devices, the client get one IP from VPN IP Pool, like 20.0.0.1 but no data flow, can not ping a device on the "other" side of the connection.

SIde A TP-LINK ER7212PC as PPTP Server

Side B /1 CUDY LT300 Outdoor as PPTP Client 

or

SIDE B /2 ASUS RT-AC750 as PPTP Client

Earlier i setup ZYXEL VPN100, and found information on the net, how to link together the VPN pool IP's with lan IP's, so it was easy to adopt in my situation.

But now, don't know how to configure NAT or any other setting to get data flow. :(

Youtube is full with much cheaper and looks more flexible ER605 videos, but nothing about this.