VPN works but remote mamgment doesn't HELP!!

[davidawbrown]

Ok here goes...........

****** This is a working solution ***********

ISP connected to a netopia ASDL router. This has been dumbed down into a basic modem with DHCP.
It connects to a server with IPCop(firewall) running on the server.
(address pool <-- 192.168.1.1 --> 192.168.1.5)
IPCop has openVPN, firewall and DHCP.
The server has a red zone card and a green zone card.
Internet comes into the red zone red zone set to auto obtain IP (from modem.)
Green zone then connects to network issuing DHCP instructions.
(address pool <-- 192.168.1.20 <--> 192.168.1.150)
The machine running IPCop has virtual machine running MS XP.
The VMS XP(Virtual Microsoft XP) has a static ip address.
192.168.1.160
OpenVPN works.
Map Network drives work.

Users at home download sensitive information.

Network typology -

Netopia (dum) <---> Server <---> Switch <----> many PC's & wireless AP.

PS. I did not set this up!

*************** The problem *************************

New router has be be integrated! <--Faster and more secure

*****************************************************

We are connecting the new router in the place of the Netopia.
Confidential device cannot disclose name. (Sorry)

Its a high level router,

When I connect this device - allow port forwarding for openVPN

Open VPN works. (Using DynDNS)

The problem is I am unable to ping any of the devices within the green zone.
I can ping the server though.
Map Network Drives does not work.

Im not sure of the problem.

I have to drive for 2 hours to get to this network and given the nature of work carries out it cant be down for more than 4 hours.

Ive tried the DMZ -- no luck :-(
Because I am connect through a tunnel ok Im just not sure weather the problem is VPN based, firewall based(IPCop), or its my new router.

Ill be up there on Friday to try it again.

Please help.
If you need any more information just let me know.

Thanks guys.

Regards
David