Networking & DNS tutorials

Networking and DNS explained simply: record types, subdomains, propagation, reverse DNS, Cloudflare, CDN, IPv6, private networks and email records.

How to find your IP address on Windows: public and local

Find your public IP address in a second and your local IP from Settings, Command Prompt or PowerShell, on Windows 10 and 11.

Set up SPF, DKIM and DMARC so your emails reach the inbox, not spam.

Find your public and local IP address on Linux: ip addr, hostname -I, GNOME Settings and the right way on a headless server.

Find your Mac's public IP address in a second and the local IP from System Settings or the Terminal, on any macOS.

Pick a single version of your domain, with or without www, and redirect the other for SEO and consistency.

Link your servers through an encrypted WireGuard tunnel, so they communicate securely without exposing services to the internet.

Cloudflare offers fast DNS, global cache and basic protection for free. Here is how to connect it to your server.

A CDN delivers content close to visitors, faster. Here is how it works and when it is worth it.

IPv6 is the future of internet addresses. Here is how to enable and check it on your server.

A, AAAA, CNAME, MX, TXT, NS: what each DNS record means and when to use it.

Use subdomains like app.example.com or blog.example.com for separate services, on the same server or others.

ping, traceroute, dig, curl and ss: the basic tools for diagnosing network problems.