What are the testing and operational best practices for access control?

Question

Accepted Answer

Five operational areas: exhaustive role × endpoint testing, logging access decisions, rate limiting, disabling directory listing, and cleaning leftover files from the web root.

Area
Actions
Why

Extensive testing
Test all role × endpoint combinations. Use SAST/DAST tools. Pen-test.
Authorization bugs are logic bugs — hard to find without systematic testing

Logging & reporting
Log all access decisions. Alert on denied-access spikes. Audit trail.
Detect attacks in progress, prove compliance

Rate limiting
Limit requests per user/IP. Progressive delays.
Prevent brute-force IDOR enumeration

No directory listing
Disable auto-indexing on web servers
Prevents discovery of hidden endpoints/files

Clean web root
Remove .bak, .old, config files, source code
Attackers scan for leftover files (e.g., config.php.bak)

Area	Actions	Why
Extensive testing	Test all role × endpoint combinations. Use SAST/DAST tools. Pen-test.	Authorization bugs are logic bugs — hard to find without systematic testing
Logging & reporting	Log all access decisions. Alert on denied-access spikes. Audit trail.	Detect attacks in progress, prove compliance
Rate limiting	Limit requests per user/IP. Progressive delays.	Prevent brute-force IDOR enumeration
No directory listing	Disable auto-indexing on web servers	Prevents discovery of hidden endpoints/files
Clean web root	Remove `.bak`, `.old`, config files, source code	Attackers scan for leftover files (e.g., `config.php.bak`)