We have recently had an unmanaged 100meg internet service installed by virgin.
They have provided us with a wan address and gateway on a /30 network as well as a public lan range of /27 which are our external addresses.
We have 2 Sonicwall NSA 3500 firewalls in failover mode which i would like to use as the gateway to our network. I would like to avoid buying a router to sit in between the two networks. Below is how i'm guessing that virgin envisage the network, however id like to remove the need for a router at our end.
LAN ---- SW NSA /27 ----- /27 OUR ROUTER /30----- | ----- /30 VIRGIN ROUTER ----- INTERNET
Is it possible to create a sub interface on the Sonicwall and the appropriate routing rules so that the sonicwall can take care of the routing to virgin and also onto our lan? and if so any pointers would be most appreciated.