As more and more organizations look to bring the edge computing closer to the data center, this can include the desktop systems that end users utilize to access the organizations systems. Bringing these systems can bring in vulnerabilities and exposures that would typically be constrained by the physical desktop device. When these systems are virtualized, a new security posture is required to protect the critical data and assets in the data center.
When visiting most Healthcare organizations during my pre-sales days, I found that many of them were using some form of Virtual Desktop Infrastructure (VDI) or Remote Desktop Session Host (RDSH) technology to present the applications to their clinicians. Regardless of the overarching technology providing these services, Horizon or even Citrix, the VMware NSX platform has several business values for securing Healthcare customers running these platforms.
Revisiting the nine NSX use cases we previously identified:
The use case of Secure End User with NSX can be further broken down into six unique use cases. A Healthcare organization does not have to use all six of them, but can start with one or more as their needs dictate. Let’s break down each use case and explain when each can meet a business need.
In the majority of Secure End user use cases, we can apply the concept of micro-segmentation to provide granular security for a Healthcare organization by protecting East-West traffic between VDI desktops, or implementing Identity-based Firewall, separation of desktop pools, even providing 3rd party integrations like Agent-less Anti-Virus or Anti-Malware into the NSX platform. Protecting the desktop or RDS hosts is straightforward, but we can even apply the same security concepts to protect the infrastructure that manages the VDI or RDSH environments.
From the virtual desktop standpoint, micro-segmentation provides a means in which we can control East-West traffic between the desktop systems. It also means, that if an organization has the need to have separate pools of desktops or even RDSH systems, NSX can provide security within each pool and between each pool, separately. In Healthcare environments, there may be a need for external coders to provide services for the organization. A new desktop pool, specifically for those external coders could be created and secured with NSX to only allow access to necessary systems.
NSX is a platform product. This means that it has capabilities that span more than just security. NSX can also provide NAT and Load Balancing services for the Edge management components of a VDI and RDSH infrastructure. This added benefit helps customers reduce the complexity of having multiple interfaces in which to manage their infrastructure servers. Healthcare systems require high availability and maximum uptime for their patient-facing systems. The NSX Edge can be put into high availability and provide Load Balancing services to meet this use case, without the additional costs of 3rd party products. These features come in even the standard version of NSX.
The ability to create logical networking constructs dynamically, is a principal use case with NSX. NSX can faithfully recreate production networks, even with the same IP addressing, and isolate each network from talking with each other. For Healthcare organizations where application uptime means patient care, the ability to quickly spin up these network reproductions can mean that copies of production applications can be placed into the isolated copy network and things like upgrades and security changes can be tested, prior, to deployment into the production workloads.
Protecting VDI Infrastructure
There’s no doubt that the virtual desktops and RDSH servers are key to a VDI deployment, but the back-end management components that provide the means to ‘spin up’ these desktops and servers, can also be protected by NSX. These systems provide desktop interfaces for clinicians and hospital staff. If these staff are unable to access the applications and systems they need to perform their jobs, it could directly affect patient care for the organization. The back-end systems which facilitate these desktops are just as critical as the desktops themselves.
Protecting Desktop Pools
NSX provides 3rd party partners with the ability to plug into the NSX framework using NetX or EPSec APIs. These APIs provide the partners the ability to integrate products such as: Next-Gen Firewalls, Intrusion Detection and Prevention solutions, as well as Anti-Virus and Anti-Malware products. By integrating with NSX, these products can remove the need for traditional in-guest agent approaches for these products. Doing so can greatly impact the overall performance and resource requirements of each of the ESXi hosts these services reside on.
User-based Access Control
Regardless of whether a Healthcare organization uses one or all the use cases in their environment, each use case provides a unique value and layered approach to securing virtualized desktops or remote session hosts. With the proximity these systems now have to the internal data center systems, their protection is very important to ensure a compromise or attack on one of them, doesn’t allow further access in the data center and to vital patient information.
Over the next several blog posts, we’ll dive deep into each of these concepts and show how to practically apply these use cases to common scenarios that a Healthcare organization may run into.