Hi,
I tried to setup a webserver (later on mailserver too) over vpn to have a fixed ip.
I took the RB951-2n and placed it after my fritz box (FB) (ISP-Router).
I connected the webserver behind the RB951-2n.
Configuration: Internet(WAN)->ISP-Router(LAN_FB)->RB951-2n(LAN_RB)->Webserver
WebServer: 192.168.88.252
I need to connect to the webserver from:
a.) Internet - VPN (fixed IP),
b.) LAN_FB (ISP-Router) - (dynamic IP) - 10.0.0.0/24,
c.) LAN_RB (RB951-2n) - Local - 192.168.88.0/24
I don’t want to use always the VPN(fixed IP), this I can get it running 
Portforwarding is no problem!
Done and worked from LAN_FB
Using just the fixed IP worked too…
I tried with mangle feature.. but could not get running
Anyone did this before and can help!?