Articles
Notes from the work.
Practical guides on websites, networks and the tools we build.
How to Check DNS When a Website Won't Load
Website won't load? Check A, AAAA, CNAME and NS records with dig and nslookup, compare resolvers, read DNS errors and rule out local causes.
How to Trace and Fix an HTTP Redirect Chain
Trace an HTTP redirect chain with curl and browser devtools, learn how 301, 302, 303, 307 and 308 differ, and fix loops, extra hops and HSTS surprises.