We have an office with internal LAN as 192.168.158.0/24 with a Juniper firewall in front which our service provider has set up the configuration for a VPN tunnel and provided details.
At the other site we have a internal LAN of 192.168.100.0/24 with a Windows 2008 R2 RRAS server which has two NIC's one internal (192.168.100.3) and one external public IP.
I have set up the Win 2008 server with RRAS and relvent IPSec settings and can see in the windows firewall there is a Main mode security association and have confirmed with our service provider that the tunnel is connected.
The problem I have is with routing, the subnet 192.168.100.0/24 can connect to the internet via the RRAS no problem however any traffic requests to the 192.168.158.0/24 network is not responding, I have had a look at static routes but cant seem to get this working.
Also from the other way if I ping an IP on the 192.168.100.0/24 subnet we can trace the pings over the VPN tunnel until it hits the external NIC of the RRAS server and stops so I am pretty certain it is a routing issue on the Windows 2008 server but cant see exactly what settings/configuration I need to change?
Has anyone set up a infrastructure like this before and know what I am missing? I have looked at the static routes and tried different combinations but cant seem to get it to work.