https://www.pistack.xyz/tags/firewall/Recent content in Firewall on Pi StackHugoen-usTue, 21 Apr 2026 00:00:00 +0000https://www.pistack.xyz/posts/2026-04-21-self-hosted-dns-firewall-rpz-unbound-powerdns-bind9-knot-guide-2026/Tue, 21 Apr 2026 00:00:00 +0000https://www.pistack.xyz/posts/2026-04-21-self-hosted-dns-firewall-rpz-unbound-powerdns-bind9-knot-guide-2026/<p>A DNS firewall sits at the edge of your network, intercepting every DNS query and blocking requests to known-malicious domains before a connection is ever established. Unlike application-layer firewalls that inspect traffic after the handshake, DNS firewalls stop threats at the resolution stage — preventing malware C2 callbacks, phishing page loads, and cryptomining scripts from reaching your infrastructure.</p>