I've got a current P2P VPN network of 16 Sonicwall routers (TZ190's) and a bunch of servers, etc. I need to set up something for users off site to be able to log into a server via RDC (to make use of current TS licenses) and access those resources, but don't want (and can't in most cases) to set up a generic point to point VPN tunnel. I'm not sure if the best way to do this would be to set up a L2TP server and have the user connect to the VPN via a windows dial up VPN connection, or if Sonicwall has a user-type application that can do this for us, etc.
What would you recommend for this? Something to consider is that the end user will not be on a static outside IP, and we only want their workstation to connect...not the rest of the LAN nodes that they are connected to. It's understood that they will only be able to VPN into one network at a time, not all 16 (though, for some cases like me being in the field, that would be pretty cool).
(I've already looked into NetExtender by Sonicwall, but the TZ190's don't do that. It needs firmware 5.2 or above, and the latest official firmware found on MySonicwall site is 4.2)