Abastion scanneris a tool or hardened system that inspects network traffic and identifies security vulnerabilities, particularly those visible from an external (internet-facing) viewpoint. It plays a key role inpost-development assessment.

OWASP Testing Guide v4.2:

'Use bastion hosts or hardened scanners to perform vulnerability assessments from an attacker's perspective.'

This option is preferable for final validation before system release, especially when looking for exposure from the public internet.

WGU Course Alignment:

Domain:System Security Engineering

Topic:Evaluate hardened systems and scanning tools during release validation