🎭The Hidden Danger: Exposed Management Planes and Internet Security πŸ’‚β€β™‚οΈ

🎭The Hidden Danger: Exposed Management Planes and Internet Security πŸ’‚β€β™‚οΈ

Exposed management planes are easy targets for hackers once vulnerabilities are revealed


3 min read

In the evolving landscape of cybersecurity, the most critical aspect of security problems often lies in how many management planes of an organization's infrastructure are exposed to the internet. When vulnerabilities become known, these exposed targets become low-hanging fruit for cyber attackers. In South Africa, and indeed across the world, a significant number of service providers leave their management interfaces exposed without proper mitigation, inadvertently inviting trouble.

The Vulnerability of Exposed Management Planes

Imagine having a fortified castle with impenetrable walls, but leaving the front gate wide open. That's essentially what happens when organizations have their infrastructure's management interfaces exposed to the internet without adequate safeguards. This vulnerability is a ticking time bomb, waiting to be exploited by opportunistic attackers.

The Firewall Conundrum

Many organizations rely on firewalls as their first line of defense, and rightly so. Firewalls play a crucial role in securing a network. However, problems arise when the device behind the firewall has its management plane directly connected to the internet. In such cases, the firewall's protection is rendered virtually useless. It's akin to locking the front door while leaving the back door wide open.

The "" Pitfall

Another unsuspecting weakness lies in the common practice of using Google's public DNS server,, on firewalls. While it might seem like a safe and reliable choice, it can be a disastrous oversight when it comes to cybersecurity. Google's DNS service is a prime target for attackers looking to compromise the entire business.

A DNS Trickery

DNS (Domain Name System) is the backbone of the internet, translating human-friendly domain names into IP addresses. Unfortunately, in its default incarnation, DNS is insecure and unencrypted. The majority of people use it as is, and most firewalls are configured to accommodate this. Here's where the danger lies: attackers can create a loopback of on a vulnerable network device, either within the business or the upstream ISP and designate it as a caching resolver. The next step is to point that to an upstream DNS server under the control of malicious threat actors. Alternatively, if the device has the ability then it is also possible to install a DNS redirection rule directly using the device's firewalling ability. Most current routers have this ability meaning that its inherent stack can be leveraged without having to install extra software.

The Impact

The result is a perilous situation where attackers can manipulate DNS queries, leading users to malicious websites, rerouting traffic, or conducting man-in-the-middle attacks. The consequences can be dire, with sensitive data at risk, compromised network integrity, and a tarnished reputation.

Mitigation Strategies

To secure your organization against these threats, it's imperative to:

  1. Segregate Management Interfaces: Keep management interfaces on a separate, isolated network that is not directly accessible from the internet.

  2. Implement Strong Access Controls: Restrict access to critical infrastructure components, allowing only authorized personnel to manage them.

  3. Utilize Secure DNS Practices: Employ DNSSEC (DNS Security Extensions) and encrypted DNS services to enhance DNS security.

  4. Regularly Update and Patch: Stay vigilant and keep systems, software, and firmware up-to-date to address known vulnerabilities.


In the world of cybersecurity, it's crucial to recognize that security isn't just about building strong fortifications; it's also about ensuring that the gates are securely locked. Exposed management planes present a significant risk to organizations, and it's our collective responsibility to fortify our digital defenses, protecting not only sensitive data but also the trust of our stakeholders.

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. πŸ‘‰ Contact Fusion