Should I perform CYDEFENCE external vulnerability scanning or external penetration testing?
The two services complement each other, so ideally you should do both. An experienced penetration tester can find issues that are not detectable by machines, for example, by chaining several minor weaknesses together to discover a hidden critical vulnerability. On the other hand, vulnerability scanners can help you automate your security checks and provide continuous protection in the periods between manual in-depth tests.
It’s important to point out though that penetration testers typically perform vulnerability scanning as part of their assessments, so if you’re just getting started and want to gain an overview of the state of your security, you will benefit from running a vulnerability scan first.