haproxy
HAProxy is one of the most powerful and reliable load balancers available. While it's often associated with HTTP load balancing, HAProxy excels at Layer 4 (TCP) load balancing for any TCP-based protocol. This guide covers everything you need to know about TCP load balancing with HAProxy. Why
bind
A well-monitored DNS infrastructure provides visibility into query patterns, performance bottlenecks, and potential security issues. This final post in the BIND series covers setting up comprehensive monitoring using Prometheus and Grafana, giving you dashboards and alerts for your DNS servers. BIND Statistics Overview BIND provides extensive statistics through several
bind
First, a short side note. Personal viewpoint: I’m not a fan of DNS over HTTPS (DoH). The main reason is not encryption itself—encryption is a good thing—but how DoH is implemented and deployed. Facts: DoH encapsulates DNS queries inside regular HTTPS traffic (TCP/443), making DNS traffic
bind
Traditional DNS queries travel in plaintext, exposing your browsing habits to network observers. DNS over TLS (DoT) encrypts DNS traffic between clients and resolvers, providing privacy and preventing tampering. This post covers implementing DoT on BIND 9 for both resolver and forwarder configurations. Understanding DNS over TLS How DoT Works
bind
After configuring DNSSEC validation on your resolvers, the next step is signing your own authoritative zones. This post covers the complete process of implementing DNSSEC on BIND authoritative servers, from key generation to zone signing and key rollovers. Understanding DNSSEC Keys DNSSEC uses two types of cryptographic keys: Key Signing
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DNSSEC (Domain Name System Security Extensions) adds cryptographic authentication to DNS responses, protecting against cache poisoning and man-in-the-middle attacks. When your resolver validates DNSSEC, it verifies that DNS responses haven't been tampered with between the authoritative server and your clients. How DNSSEC Validation Works DNSSEC
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Response Policy Zones (RPZ) provide DNS-level security by allowing you to override DNS responses for specific domains. This enables blocking malicious domains, implementing content filtering, and protecting your network from phishing, malware, and other threats at the DNS layer - before connections are even established. How RPZ Works RPZ intercepts
bind
External-DNS is a Kubernetes controller that automatically creates and manages DNS records based on Kubernetes resources like Services and Ingresses. When combined with BIND using the RFC2136 (dynamic DNS) provider, you get fully automated DNS management for your Kubernetes workloads without relying on cloud DNS providers. How External-DNS
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Dynamic DNS (DDNS) allows automated systems to update DNS records in real-time. This is essential for DHCP servers registering client hostnames, Kubernetes services updating their endpoints, or any system that needs programmatic DNS record management. BIND supports secure dynamic updates using TSIG (Transaction Signature) authentication. How Dynamic DNS Works
bind
A properly secured DNS server is critical infrastructure. An open resolver can be abused for DNS amplification attacks, leak internal network information, or serve as a reconnaissance tool for attackers. This guide covers BIND's security features: Access Control Lists (ACLs), views for split-horizon DNS, and query restrictions
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RNDC (Remote Name Daemon Control) is the administrative tool for managing BIND DNS servers. It allows you to reload zones, flush caches, view statistics, and perform other administrative tasks without restarting the entire service. RNDC uses TSIG (Transaction Signature) keys for authentication, ensuring only authorized administrators can control your DNS
linux
An authoritative DNS server is the definitive source of DNS records for the domains it hosts. Unlike recursive resolvers that query other servers, authoritative servers directly answer queries with the records they maintain. In this guide, we'll configure BIND 9 as an authoritative-only DNS server. 1. Authoritative
