Four nginx misconfigurations that pass config tests but silently break security

Certain nginx misconfigurations are especially dangerous because they produce no errors, pass validation checks, and leave servers quietly misbehaving without any runtime signal. Common examples include enabling OCSP stapling without configuring a resolver, causing nginx to silently skip certificate revocation checks entirely. Access control rules without an explicit 'deny all' directive default to allowing all traffic, and inner location blocks can inadvertently override and discard server-level restrictions. Additionally, placing a 'return' directive before access rules causes nginx to skip the access phase altogether, rendering IP allowlists ineffective. Static analysis tools are currently the most reliable way to catch this category of misconfiguration, since no log entries or runtime errors indicate the failure.