Why DNS-over-HTTPS Breaks Pi-hole and Parental Controls
Firefox turns on DNS-over-HTTPS by default, quietly routing lookups around Pi-hole and router-level parental controls. Here’s why, and three ways to fix it.
DNS Guides: Records, Lookups & Troubleshooting | NetworkCheckr
How the Domain Name System works — record types, reverse lookups, propagation delays, and step-by-step fixes for DNS resolution problems.
DNSSEC Explained: What It Protects and How to Check It
DNSSEC adds cryptographic signatures to DNS records so resolvers can verify they are authentic. Learn what it protects, how the chain of trust works, and how to check any domain.
DNS over HTTPS vs DNS over TLS: Encrypted DNS Explained
DNS over HTTPS vs DNS over TLS confuses even seasoned admins. One hides your lookups inside web traffic; the other keeps them visible. Here is how DoH and DoT differ and which to turn on.
How Long Does DNS Propagation Take? A Practical Answer
Wondering how long DNS propagation takes? Most changes go live in 5 to 60 minutes when TTL is set right. Here’s what actually controls the wait — and how to make it minutes.
How to Read a WHOIS Lookup (and Why It’s Now RDAP)
Want to know how to read a WHOIS lookup today? The protocol is actually RDAP now. Here is what registration data shows, why most fields are redacted, and how to spot red flags.
How DNS Works: A Plain-English Walkthrough
How does DNS actually work? Walk through the full resolution chain from browser cache to authoritative nameservers. You’ll also see modern encryption protocols (DoH, DoT, DoQ) and exactly what changed in 2026.
What Is Reverse DNS? PTR Records and Email Deliverability
Wondering what reverse DNS is and why your emails are bouncing? PTR records and FCrDNS now decide whether Gmail, Outlook, and Yahoo accept your mail. Here is what changed in 2024-2025 and how to fix it.
DNS Records Explained: A, AAAA, MX, CNAME, TXT, NS
Understand every DNS record type you’ll actually use, from A and MX to TXT and NS, with real examples. Plus the new HTTPS and SVCB records that speed up HTTP/3 and enable Encrypted Client Hello.