Your Domain's External Attack Surface: What Hackers See Before You Do Published on hashnode.com — target tags: security, cybersecurity, api, devops, dns Here's a scenario that plays out constantly: a company gets breached. The incident report comes back and the finding is something embarrassingly basic — an expired SSL cert with a weak cipher suite, an open Redis port, no SPF record on the primary domain so attackers spoofed their emails for months. The kicker? Any attacker (or anyone else) could have spotted these issues in 30 seconds with an external scan. The company just never looked. What "external attack surface" means Your external attack surface is everything visible from the public internet, without any credentials or inside access. It's what your clients see, what search engines index, and what attackers enumerate.…