Oracle Linux 10 – Common Problem 030 – Diagnosis and Fix

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

NGINX returns 502 because SELinux denies outbound proxy connection.

Environment & Reproduction

audit logs show AVC denial for httpd_t name_connect.

Root Cause Analysis

Run ausearch -m AVC -ts recent and getenforce.

Quick Triage

Boolean for network connects by httpd is disabled.

Step-by-Step Diagnosis

Enable setsebool -P httpd_can_network_connect 1 and verify contexts.

Solution – Primary Fix

Confirm NGINX upstream responds and no new AVC events appear.

Solution – Alternative Approaches

Include SELinux boolean checks in deployment checklist.

Verification & Acceptance Criteria

Disable boolean only if business requirement changes.

Rollback Plan

Apply booleans via Ansible seboolean module.

Prevention & Hardening

getenforce; setsebool -P httpd_can_network_connect 1; journalctl -t setroubleshoot

Related Errors & Cross-Refs

Share AVC records and policy package versions.

Related tutorial: View the step-by-step tutorial for oracle-linux-10.

View all oracle-linux-10 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Avoid switching SELinux to permissive as a permanent workaround.