Yes you can, but it depends entirely on the configuration and type of VPN or Proxy. Most importantly, your device should be able to access the target device. You can check if you have access by going to the domain address or IP of the target device. If the browser does not timeout, but loads a page then you can connect using SvW. If the browser times out or if no page are shown, then you will likely not be able to use SvW. For reference, the page that you would expect to see if you where to connect directly to an SM800 is this: INSERT SCREENSHOT OF SM800 PAGE, and the page that you would expect to see if you where to connect to an SM800A is this: INSERT SCREENSHOT OF SM800A