Guides
Answer-first how-tos for the questions behind AdminKit's tools: why an IP gets blacklisted, what CGNAT means, how to read an SPF record, and how to check whether a device protocol is exposed.
How to Secure an MCP Server | AdminKit Guide
Secure an MCP server with OAuth per spec, a tool allowlist, and filtering for prompt injection in tool responses. A practical checklist with sources.
IPv6 at Home: Why No NAT Means a Firewall | AdminKit
IPv6 gives each home device its own public address, with no NAT in the way. Without a proper firewall, devices can be reachable directly from the internet.
Is Modbus TCP (Port 502) Exposed? | AdminKit
Modbus TCP has no built-in authentication, so anything reachable on port 502 can usually be read or written by anyone. Check your exposure and fix it.
Is My Router's DNS Hijacked? | AdminKit Guide
DNS hijacking silently redirects your traffic by changing which resolver you use. Check the signs, confirm your actual resolver, and fix a hijacked router.
Is Port 1883 (MQTT) Open on My Router? | AdminKit
Port 1883 is the default MQTT port, and MQTT allows anonymous connections by default. Check if yours is exposed to the internet, and how to close it.
What Is CGNAT and Why It Confuses Sites | AdminKit
CGNAT means your ISP shares one public IP among many customers. Learn why that causes blacklists, CAPTCHAs and shared blame, and how to check if you have it.
Why Is My IP Address Blacklisted? | AdminKit Guide
An IP lands on a blacklist when spam, malware or abuse traps trace back to it. Check which list flagged you, find the cause, then request delisting.
SPF, DKIM and DMARC Explained | AdminKit Guide
SPF lists who can send your mail, DKIM signs it, DMARC says what to do if both fail. See real record examples and how to check your own domain.