NUNX technology guide
Website and Web Technology Help
Understand website failures, domain names, DNS and browser developer tools.
Practical starting points
Clear answers to common problems.
01Web technologyDiagnose a website not loading
Find whether the browser, DNS, server, certificate or internet connection is responsible.
- Record the exact error, URL, device and network.
- Test another browser and another internet connection.
- For your own site, check DNS, certificates and deployment logs.
Open the complete guide →02Web technologyUnderstand domains and DNS
Learn how nameservers and common DNS records connect websites and email.
- A and AAAA records point names to internet addresses.
- CNAME records create aliases; MX records direct email.
- Back up working DNS records before making changes.
Open the complete guide →03Web technologyUse browser developer tools
Inspect layout, JavaScript errors, network requests and responsive behavior.
- Use Elements to inspect HTML and CSS.
- Use Network to find failed or slow requests.
- Never paste unknown commands into the Console.
Open the complete guide →