DNS

Understand DNS fundamentals, configuration, troubleshooting, and its role in network connectivity and enterprise environments.

Active Directory Automation DNS DNS Security Microsoft PowerShell

Core365 DNS Stale Record Scanner (PowerShell) – Clean Up Stale AD DNS Records Fast

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The Real‑World Problem In real enterprise environments, DNS is never simple. You don’t just have one zone — you have: When a Domain Controller is decommissioned, DNS often keeps stale records behind: Manually checking and cleaning these across dozens (or hundreds) of zones is: The Solution – Core365 DNS Stale Record Scanner Core365-DNS-StaleRecord-Scanner is a […]

DNS Networking

DNS Record Types Explained: A, AAAA, CNAME, MX, TXT, SRV, CAA, PTR, HTTPS/SVCB + Deep Troubleshooting – Part 1

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DNS looks deceptively simple—names in, IPs out—but production DNS is a distributed database with caching, delegation boundaries, transport quirks, and cryptographic validation (DNSSEC) layered on top. This guide is written as a “field manual”: what each DNS record type does, when to use it, how to configure it, and what to check when it breaks.

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