Hi!
I think even 1CPU should work, to be honest, its only stupid I/O with some tunneling.
2GB+2CPU is our default minimum-set on Virtual Machines, an if I had a look on the Dashboards of the VM (not monitored with NMS ;->) it even doesnt use the 2 CPU and the 2 GB neither ;->
But soleyly speaking of Linux not Winblows!
Well but it depends all on the amount of traffic an Messages taht will come though the tunnel, if you have a VM with 200 Guests with 20 Merics each and QoS, and NetApp-Filers with a Netapp-Probe, and lotsa robots with QoS and Monitoring, then this will possible not fit with "my machine" :->
cheers
Matthias