I currently have two RV042 routers, both are connected to the ethernet via PPPOE DSL, a VPN tunnel created between both, just using basic PHASE 1 (group 1 des md5), no phase 2 or Perfect Forward Privacy enabled. One site "A" is a windows xp client, site "B" is where the domain server is located, SBS 2003 running Exchange. We want the client in Site A to join the domain to be able to logon and attach to shares, as well site B is where the Exchange server is located. and although the clinet has site B's DNS, and WINS , we can ping OK can NBTSTAT server in site B, but get error when trying to join the client computer to the DOMAIN. I have tested a VPN from another site, where the connection is an ADSL same router, Iwas able to joint the domain after setting the MTU to 1428. So I applied the same to the site A, but still no go. We are at the point of looking at alternatives, including a wireless site to site, or converting the site B to an ADSL connection, but cost $$$$. Anyone have success with Windows Domain, VPN on a PPPOE DSL at both ends?