👹Don't Succumb to the Dark Side of the Force by having your Infrastructure Compromised! 👺

👹Don't Succumb to the Dark Side of the Force by having your Infrastructure Compromised! 👺

Improve Your Network Safety with Quad9 DNS


3 min read

In today's digital landscape, where cyber threats are more sophisticated and pervasive than ever, securing your connectivity infrastructure is paramount. Whether you're managing switches, routers, firewalls, servers, phones, or IoT devices, there's one simple, yet incredibly effective step you can take to dramatically enhance your security posture: use a secure DNS service like Quad9.

What is Quad9?

Quad9 ( is a free, recursive, anycast DNS service that focuses on privacy and security. It was established through a collaboration between the Global Cyber Alliance, IBM, and Packet Clearing House. Unlike traditional DNS services, Quad9 actively blocks access to known malicious domains, thereby preventing your devices from connecting to harmful websites.

How Quad9 Works

Quad9 operates by leveraging threat intelligence feeds from over 19 different sources, including reputable cybersecurity firms and research institutions. When a device in your network makes a DNS query, Quad9 checks the requested domain against its extensive database of known malicious domains. If the domain is flagged as harmful, Quad9 blocks the connection, effectively stopping the threat before it reaches your network.

The Power of Secure DNS

Implementing Quad9 as your DNS server ( across all devices in your connectivity infrastructure can mitigate up to 80% of known threats. This simple configuration change is both cost-effective and powerful, providing a significant boost to your security resilience.

Cyber Attacks and Quad9 Mitigation

Let's look at how Quad9 can defend against common cyber attacks:

Phishing Attacks

Phishing remains one of the most prevalent cyber threats, tricking users into providing sensitive information via fraudulent websites. By blocking known phishing domains, Quad9 prevents users from inadvertently accessing these malicious sites, thus reducing the risk of credential theft and data breaches.

Malware Distribution

Malware distribution often relies on compromised or malicious domains to deliver harmful payloads to victims. Quad9's threat intelligence blocks access to these domains, stopping malware in its tracks before it can infect your devices and spread throughout your network.

Command and Control (C2) Servers

Many advanced cyber attacks involve C2 servers, which attackers use to control compromised devices and exfiltrate data. Quad9 intercepts and blocks DNS queries to these C2 servers, cutting off communication between the attacker and the compromised device, effectively neutralizing the threat.

Real-World Impact

By integrating Quad9 into your connectivity infrastructure, you can proactively defend against a wide range of cyber threats. Here's how to do it:

  1. Routers and Firewalls: Configure your router or firewall to use as the primary DNS server.

  2. Servers: Update the DNS settings on your servers to use Quad9.

  3. Switches: Ensure network switches are set to use Quad9 for DNS queries.

  4. Phones and IoT Devices: Configure individual devices, including smartphones and IoT devices, to use for DNS resolution.


For any geek responsible for connectivity infrastructure, the single most productive and cost-effective step to improve security is to implement Quad9. By simply provisioning as your DNS server, you can block access to known malicious domains and dramatically enhance your network's resilience against cyber attacks.

Don’t wait until your network is compromised. Take proactive steps now and make Quad9 your go-to DNS service for robust, comprehensive protection. The minimal effort required to configure Quad9 is a small price to pay for the significant security benefits it delivers.

Quad9 is not just a DNS service; it's a formidable ally in the ongoing battle against cyber threats. Make the switch today and experience the peace of mind that comes with knowing your infrastructure is protected by one of the most effective security tools available.

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.