Most attacks start with a click or a background connection. Stopping bad domains at the DNS layer cuts off malware downloads, phishing pages, and command-and-control beacons without slowing users or changing their workflow.
Device asks DNS for a domain’s IP.
DNS firewall checks live threat feeds and your allow/deny policies.
It returns a normal answer for safe domains—or blocks/redirects risky ones.
Supports response policies (RPZ), categories (malware, phishing, adult, crypto-mining), and custom lists.
Security: block malware/phishing/C2 by default.
Compliance & productivity: restrict categories at work/school.
Home networks: one setting protects every device behind the router.
Won’t catch IP-only traffic or some VPN/Tor tunnels.
Users can try alternate DNS unless you enforce it on the network.
False positives happen—keep an allowlist and review logs.
Choose a reputable DNS firewall (managed service or on-prem with RPZ).
Force all DNS to it at the router/firewall; block outbound 53/853 to others.
Enable DoH/DoT to your resolver to prevent tampering.
Start in monitor mode for a week, then enforce.
Maintain custom allow/deny lists; alert on malware and phishing blocks.