🏋️‍♂️Strengthening Networks: Why SD-WAN Offers a Secure Edge Over Traditional WAN Technologies 📡

🏋️‍♂️Strengthening Networks: Why SD-WAN Offers a Secure Edge Over Traditional WAN Technologies 📡

Learn why SD-WAN is safer than traditional WAN with its reduced attack surface.


3 min read

In the dynamic realm of networking technologies, the adoption of Software-Defined Wide Area Network (SD-WAN) is gaining momentum, and for good reason. SD-WAN is not only a response to the evolving needs of businesses but also a leap forward in terms of security when compared to traditional Wide Area Network (WAN) technologies.

The Unique Security Advantage of SD-WAN

Unlike its predecessors, SD-WAN's primary justification lies in its ability to deploy publicly accessible links, essentially turning them into interface nodes on the Internet. This might seem akin to the functionality of a firewall, but there's a key difference—SD-WAN boasts a smaller attack surface.

The dedicated purpose of SD-WAN to provide a singular functional service means that its attack surface is inherently limited. In contrast, firewalls often face challenges with the creation of unintended holes by administrators, along with the accumulation of ghost rules that may no longer serve a functional business process. These factors contribute to a significantly larger attack surface for hackers when targeting firewalls.

The Mordac Quandary: Unveiling New Concerns

Enter Mordac, the renowned Information Security expert, who has found a new network service to scrutinize—SD-WAN. With the release of the SD-WAN Harvester tool by SCADA StrangeLove, concerns about potential vulnerabilities were raised. However, these concerns stem from assumptions about dated operating systems and enabled services that offer no operational function for SD-WAN.

In reality, a properly configured SD-WAN deployment adheres to basic hardening practices, avoiding unnecessary exposure to potential exploits. The assumption that SD-WAN is inherently vulnerable is, therefore, misplaced.

Understanding SD-WAN Deployment Variants

SD-WAN offers various deployment variants tailored to different organizational needs. These include:

  1. Full Enchilada Version: Comprehensive functionality catering to enterprise requirements.

  2. Lite Version: Stripped-down functionality designed to match the requirements of small businesses.

  3. Slaptjips Version: A variant optimized for singular users, providing secure access to business resources.

  4. Woodpecker Version: Tailored to offer off-network users access to business resources, achieved through a dedicated client connecting to the SD-WAN concentrator in the data center.

For optimal security, it is recommended that the woodpecker version, utilizing a client for authenticated and secured connectivity, be the mandatory method for administrating an SD-WAN concentrator across all networks.

Wrap: Elevating Network Security with SD-WAN

As businesses navigate the ever-changing landscape of networking technologies, the adoption of SD-WAN emerges not only as a solution to operational needs but also as a secure alternative to traditional WAN technologies. By minimizing the attack surface and embracing tailored deployment variants, SD-WAN stands at the forefront of fortifying networks against potential threats.

In the pursuit of enhanced security and efficiency, SD-WAN offers a strategic advantage, proving that progress in networking can indeed be synonymous with heightened security measures.

Ronald Bartels ensures that Internet inhabiting things are connected reliably online at Fusion Broadband South Africa - the leading specialized SD-WAN provider in South Africa. 👉 Contact Fusion