The Data Center Fight Is Mostly About AI Scale
The data center fight is growing as communities challenge AI projects. See why essential internet infrastructure deserves a separate debate.
Networking Guides: DNS and Troubleshooting
Practical networking guides from FOO.XYZ covering DNS, Linux and FreeBSD troubleshooting, with command examples and explanations of the results.
Infrastructure
Networking
What Is a VLAN? A Beginner's Guide to Network Segmentation
Learn how VLANs separate devices on one network, how access and trunk ports work, and what to check before deploying VLANs in a small business.
What Is DNS and How Does It Work?
Learn how DNS turns domain names into IP addresses, how servers and caches handle a lookup, and why finding an address differs from loading a page.
What Is DNSSEC? A Simple Guide to Secure DNS
Learn what DNSSEC is, how it protects DNS records, and how to check signatures, public keys, and resolver validation with simple dig commands.
DNS Troubleshooting with Dig and Drill
Learn to use dig and drill on Linux and FreeBSD to inspect DNS records, compare resolvers, trace delegation, and troubleshoot DNSSEC failures.
Security
Dangling DNS Records, Placeholder Domains, and the Cost of Lazy IT
Forgotten DNS records and placeholder domains can expose sensitive information. Learn how misconfigurations lead to unexpected DNS traffic and email leaks.