Firewall/NAT

Hi,

I hope someone could help me to solve the problem with my firewall (m0n0wall 1.36).

I have the following setup:

LAN Interface: 192.168.8.0/22
WAN Interace: 193.xxx.xxx.xxx.xxx/32
OPT 1 (Perimeter) -> bridged to WAN with IP-Addresses from 193.xxx.xxx.xxx/22

I also have a PPTP VPN running with address space in 192.168.12.0/24. I can reach every host except the bridged ones from OPT 1 from a VPN Client. How do I have to configure the firewall so that the PPTP Clients can reach the filtered hosts? From outside the firewall rules work perfectly.

Big Thx.

Bye