Site-to-Site VPN & SBS 2003 Premium R2

So here I am with my dual NIC SBS 2003 Premium R2 behind a Sonicwall Pro 1260
at the main office (with each NIC1 on 192.168.9.x subnet while the LAN NIC
(NIC2) is in a 192.168.10.x subnet). The branch office also has a Sonicwall
Pro 1260. At the moment all users at the branch office each use their VPN
client to connect to the SBS PPTP VPN via RRAS. However, we need to make
things much better by implementing site-to-site VPN to eliminate desktop VPN
clients. So far this seems to have been set up by Sonicwall techs but the
branch office users are still unable to access server resources with the
site-to-site VPN.
Any ideas on what we might be missing here?

 

Hi techieg,

You need to single NIC the SBS, as right now the sonicwalls are setting up
the VPN to the 9.x network - which is in no-mans land between the internet
and your SBS.

Keep your SBS Lan side at 192.168.10.x - your SBS and all connect devices
there will be on 10.x., including the router lan side - you'll need to
reconfigure the router lan IP.
At the other end, your router lan side is 192.168.11.x (where 11 is anything
but 10). Devices at the remote end will be on the 11.x addressing - you can
do this manually, or via DHCP on the remote router, (or with DHCP
passthrough but that's a bit more complicated).

At the SBS end, connect your sonicwall lan port and your sbs lan nic
directly to the switch, and disable the old WAN nic. Run the CEICW,
selecting the appropriate settings for a single nic with router.

That's the basic connectivity - you'll need to add the new subnet to SBS
configuration in a few spots to get seamless connectivity in IIS.