spf-dkim-dmarc-simplified

Email security is a key part of internet communication. But what are SPF, DKIM, and DMARC, and how do they work? This guide will explain it all in simple terms to make these concepts clearer.

ssl-certificate-chain-guide

Certificate chains are a key part of internet security. But what are they, and how do they work? This guide will explain it all in simple terms to make the concept clearer.

ipnet

IP subnet calculator CLI tool, your network info Swiss Army knife.