I am actually working on build something similar. So, you could roll out an app-specific VPN like secure tunnel real easy. It is inspired by the work at Google IT called BeyondCorp [1].
The target market is companies whose employees require secure remote access to internal apps, but IT does not want to give a broad network access via VPN. So, marketing/sales like employees who simply want to access internal portals, etc. without the hassle of dialing into a VPN.
The target market is companies whose employees require secure remote access to internal apps, but IT does not want to give a broad network access via VPN. So, marketing/sales like employees who simply want to access internal portals, etc. without the hassle of dialing into a VPN.
[1] http://research.google.com/pubs/archive/43231.pdf