6 docs tagged with "dns"

A practical introduction to what DHCP actually provides, how a client obtains its network configuration, and what an IP address lease really means.

www was never special — it's an ordinary hostname that happens to be famous. I found out none of my own sites answer to it, which turned a terminology question into a reason to build a scanner.

Four more domains, same missing www. Every certificate already covered it and every distribution already accepted it — only the DNS record was absent. Nothing in AWS reports that state, because no single service can see it.

www.csv-helper.com returned NXDOMAIN for years. The certificate already covered it and CloudFront already accepted it — every part of the fix was done except the DNS record. Then I swept the account and found four more exactly like it.

Every modern host hands you a hostname and tells you to CNAME to it — which is exactly the one thing your bare domain cannot do. The rule is one sentence from 1987, and everything since has been a workaround.

Open working notes for a Go scanner that classifies www support across a domain corpus — corpus sourcing, positional storage, trend methodology, and where the throughput is expected to give out.