Skip gateway error codes in IIS shortnames detection

[liquidsec]

Summary

• Skip 502/503/504 gateway error codes in iis_shortnames.detect() — these come from CDNs and reverse proxies, not IIS, and were causing false positives on CDN-fronted non-IIS hosts
• Add negative test confirming no FINDING is emitted when the server returns 502

[github-actions]

📊 Performance Benchmark Report

Comparing 3.0 (baseline) vs fix-iis-shortnames-gateway-fp (current)

📈 Detailed Results (All Benchmarks)

📋 Complete results for all benchmarks - includes both significant and insignificant changes

🧪 Test Name	📏 Base	📏 Current	📈 Change	🎯 Status
Bloom Filter Dns Mutation Tracking Performance	4.24ms	4.25ms	+0.3% ⚪	✅
Bloom Filter Large Scale Dns Brute Force	17.44ms	17.63ms	+1.1% ⚪	✅
Large Closest Match Lookup	333.40ms	355.74ms	+6.7% ⚪	✅
Realistic Closest Match Workload	178.97ms	188.40ms	+5.3% ⚪	✅
Event Memory Medium Scan	1781 B/event	1781 B/event	-0.0% ⚪	✅
Event Memory Large Scan	1768 B/event	1768 B/event	+0.0% ⚪	✅
Event Validation Full Scan Startup Small Batch	370.39ms	369.66ms	-0.2% ⚪	✅
Event Validation Full Scan Startup Large Batch	526.65ms	520.86ms	-1.1% ⚪	✅
Make Event Autodetection Small	25.57ms	25.61ms	+0.2% ⚪	✅
Make Event Autodetection Large	255.67ms	257.72ms	+0.8% ⚪	✅
Make Event Explicit Types	10.85ms	10.83ms	-0.1% ⚪	✅
Excavate Single Thread Small	3.451s	3.492s	+1.2% ⚪	✅
Excavate Single Thread Large	8.688s	8.734s	+0.5% ⚪	✅
Excavate Parallel Tasks Small	3.660s	3.662s	+0.1% ⚪	✅
Excavate Parallel Tasks Large	6.791s	6.817s	+0.4% ⚪	✅
Is Ip Performance	3.12ms	3.18ms	+1.8% ⚪	✅
Make Ip Type Performance	11.29ms	11.18ms	-1.0% ⚪	✅
Mixed Ip Operations	4.44ms	4.48ms	+0.9% ⚪	✅
Memory Use Web Crawl	46.0 MB	46.0 MB	+0.0% ⚪	✅
Memory Use Subdomain Enum	19.4 MB	19.4 MB	+0.0% ⚪	✅
Scan Throughput 100	7.984s	8.337s	+4.4% ⚪	✅
Scan Throughput 1000	39.286s	37.471s	-4.6% ⚪	✅
Typical Queue Shuffle	61.14µs	61.84µs	+1.1% ⚪	✅
Priority Queue Shuffle	714.62µs	697.66µs	-2.4% ⚪	✅

🎯 Performance Summary

✅ No significant performance changes detected (all changes <10%)

---

🐍 Python Version 3.11.15

[codecov]

Codecov Report

❌ Patch coverage is 94.73684% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 91%. Comparing base (39b9d31) to head (c8d9758).
⚠️ Report is 11 commits behind head on 3.0.

Files with missing lines	Patch %	Lines
..._step_2/module_tests/test_module_iis_shortnames.py	94%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##             3.0   #3034   +/-   ##
=====================================
+ Coverage     91%     91%   +1%     
=====================================
  Files        440     440           
  Lines      37411   37430   +19     
=====================================
+ Hits       33890   33908   +18     
- Misses      3521    3522    +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.