Clusters
Every AdminKit tool, guide, glossary term, comparison and solution belongs to one of six technical clusters. Each hub below answers the core question for that cluster and links out to the tools, guides and definitions that go deeper.
DNS
DNS turns domain names into the IP addresses, mail servers and records your tools actually look up — most "it broke" reports trace back to one wrong or missing DNS record.
Email authentication
SPF, DKIM and DMARC are the three DNS-published records that tell receiving mail servers whether a message from your domain can be trusted — get one wrong and mail lands in spam or gets rejected outright.
IP & network
Your public IP, subnet and routing determine who can reach your connection and how it is addressed on the internet — the starting point for almost every other check on this site.
Machine protocols
MQTT, Modbus, RDP, VNC and the other protocols your devices and legacy systems speak were mostly designed for trusted local networks, not the open internet — exposing one is a common way in for an attacker.
AI agents & MCP
The Model Context Protocol lets AI agents call tools and read resources over a network connection, which means an unauthenticated or misconfigured MCP server can hand an agent — or an attacker — more access than intended.
Security basics
TLS certificates, HTTP security headers and open ports are the fundamentals every internet-facing service should get right, independent of which protocol or cloud it runs on.