Domain Name System explained
DNS is one of the internet's most fundamental services. Every time someone visits a website, sends an email, or uses a cloud app, DNS quietly looks up the right address behind the scenes. Without it, you'd have to remember strings of numbers instead of names. It's so essential — and so universally trusted by devices — that it's both a critical dependency and a common target.
Because nearly all traffic starts with a DNS lookup, DNS is also a powerful security control point. DNS filtering can block access to known malicious, phishing, and malware domains at the moment of lookup — before a connection is ever made. Conversely, attackers abuse DNS to redirect users to fake sites, hijack domains, or smuggle data out of a network, which is why securing it matters.
Why DNS matters for your business
A DNS problem can take a business completely offline — websites, email, and cloud apps all stop resolving. And because DNS is so trusted, attackers exploit it: redirecting users to fraudulent sites, intercepting email, or using DNS as a covert channel to exfiltrate data past other defences.
Properly managed and secured DNS turns this critical dependency into an active line of defence. DNS filtering blocks malicious destinations early, and monitoring DNS activity reveals threats — like malware phoning home — that other tools might miss. It's a high-leverage, often-overlooked security layer.
Scalogic secures and manages your DNS
Scalogic manages and protects your DNS as part of our network and cybersecurity services. We deploy DNS filtering to block malicious, phishing, and malware domains before a connection is made, secure your domain records against hijacking, and monitor DNS activity for signs of compromise.
Tied into our 24/7 SOC, unusual DNS behaviour — a hallmark of malware and data exfiltration — gets investigated and acted on. It's a simple, powerful layer that strengthens protection against phishing and malware across your whole organization.
Frequently asked questions
What does DNS filtering do?
It blocks access to known malicious, phishing, and malware domains at the moment of lookup — stopping the connection before any harm is done.
Can DNS be hacked?
DNS can be abused — through hijacking, redirection to fake sites, or data exfiltration. Securing domain records and monitoring DNS activity, as Scalogic does, mitigates these risks.
Why does DNS security get overlooked?
Because DNS works invisibly until it breaks. But since nearly all traffic starts with a DNS lookup, it's a high-leverage point for both attack and defence.