Guides
In-depth guides
Longer walkthroughs for specific setups: real screenshots, code you can paste and the reason behind every step. The short fix page for each check lives under Learn.
All guides
30 guides, page 1 of 3.
- Best practices9 min read
ERR_ADDRESS_UNREACHABLE: when there is no route to the address
ERR_ADDRESS_UNREACHABLE means your device found no route to the site's address. A VPN remnant, broken IPv6 or a stale router causes most cases.Updated 29 Oct 2026 - Best practices10 min read
Is my website down? The 5-minute triage
A website down checker tells you whether your site is down for everyone or just you. Here is the 5-minute triage, and what to do in the first 10 minutes.Updated 28 Oct 2026 - Best practices10 min read
ERR_CONNECTION_TIMED_OUT: what the silence means and how to fix it
ERR_CONNECTION_TIMED_OUT means the browser asked for a connection and nothing ever answered. Clear the visitor-side causes in minutes, then find what is swallowing packets on the way to your server.Updated 26 Oct 2026 - Best practices10 min read
ERR_NAME_NOT_RESOLVED: fix it on Android and desktop
ERR_NAME_NOT_RESOLVED means Chrome could not get any usable DNS answer for the address, so it had nothing to connect to. Here is the Android fix ladder with the exact settings paths, the short desktop version, and the rare case where the site is the cause.Updated 23 Oct 2026 - Best practices12 min read
WHOIS lookup: read a domain's public record
What a WHOIS lookup shows and how to run one: every field of the record explained, the status codes that protect a domain, and where RDAP has taken over.Updated 22 Oct 2026 - Best practices12 min read
ERR_CONNECTION_REFUSED: fixes for visitors, localhost and servers
ERR_CONNECTION_REFUSED means the machine is there and actively turned the connection away. Here are the visitor steps, the localhost diagnosis with the exact commands, and the server-side causes in the order they actually occur.Updated 21 Oct 2026 - Best practices13 min read
DNS lookup: how to run one and read every record
Run a DNS lookup with dig or nslookup and read every field of the answer: sections, flags, TTLs and all ten record types, with commands to copy.Updated 18 Oct 2026 - Best practices12 min read
"This site can't be reached": every variant of the Chrome error
"This site can't be reached" is Chrome's cover page for several different failures, and the sub-code underneath decides the fix. Match your code in the table, jump to its fix, or run the checklist that clears most cases.Updated 15 Oct 2026 - Best practices21 min read
What is DNS? Records, resolvers and TTLs in plain language
DNS turns the names people type into the addresses machines connect to. How a lookup really travels, every record type that matters, TTLs, caching and the commands to see it yourself.Updated 11 Oct 2026 - Best practices14 min read
What is a reverse proxy? Caddy, nginx and Cloudflare explained
A reverse proxy is a server that sits in front of your website or app: it receives every request from the internet and forwards each one to the application behind it. What it is used for, the minimal Caddy and nginx configs, and the headers that keep it from breaking your site.Updated 9 Oct 2026 - Best practices12 min read
DNS_PROBE_FINISHED_NXDOMAIN: fixes for visitors and site owners
DNS_PROBE_FINISHED_NXDOMAIN means the DNS lookup came back with "no such name", so the browser had no address to connect to. Here are the visitor fixes in order, then how site owners find the expired domain or missing record behind it.Updated 8 Oct 2026 - Best practices13 min read
Brotli compression: gzip vs Brotli and how to enable it
Brotli compression shrinks HTML, CSS and JavaScript by around 80 % before they leave your server, a few percent better than gzip. What to compress, which to pick, and configs for nginx, Apache, Caddy and Cloudflare.Updated 4 Oct 2026
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