ENDIAN Firewall - Setting up Endian Software UTM in the cloud for a small office?

Greetings,

I have several requests from clients in small businesses that have the usual DSL Modem>Linksys Router>Lan setup. These customers are very geographically diverse, being hundreds of kilometers apart, and want to pay on a monthly basis.

Does anyone have any general idea if it is possible to host an Endian in a colocated, or virtual server with a single public IP so that it would serve as an external proxy for the customer's LAN? Primarily we would like it to be used for content filtering and virus.

I found a document on the Endian site that alludes to this but it was short on details.

Are any of you using such a setup? Thanks in advance!!

SE