Confirm staging and development environments are not publicly accessible

Confirming staging and development environments aren't publicly accessible addresses a genuine, surprisingly common security gap — these environments frequently contain less mature security configurations than production, sometimes including test data, debugging information, or relaxed security settings specifically because they're intended for internal development use rather than public access.

The genuine risk here compounds when these environments are inadvertently publicly accessible — an attacker discovering an exposed staging environment potentially gains access to a version of your application with weaker security controls, possibly including debugging features that reveal sensitive information, or test credentials that might provide broader access than intended.

This exposure commonly occurs through deployment or infrastructure configuration oversights — a staging environment set up for internal team access sometimes ends up technically reachable from the broader internet due to network configuration that wasn't specifically restricted to internal access only, representing an unintentional gap rather than any deliberate exposure decision.

Verification requires genuinely confirming these environments are actually restricted through proper access controls — IP allowlisting, VPN requirements, or authentication requirements specifically for these non-production environments, ensuring they remain genuinely accessible only to your legitimate internal team rather than inadvertently exposed to the broader public internet where their typically weaker security posture creates genuine additional risk.