NFS Mount Permission Denied On SELinux Enforcing Hosts

📖 ~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

NFS mount attempts fail with permission denied despite reachable server and valid exports.

Environment & Reproduction

SELinux booleans or context rules block access, or firewalld is missing required NFS services.

Root Cause Analysis

Run showmount -e , getenforce, and sudo journalctl | grep -i avc for denials.

Quick Triage

Enable necessary booleans such as setsebool -P use_nfs_home_dirs on clients where applicable.

Step-by-Step Diagnosis

Open nfs, mountd, and rpc-bind services in firewalld on relevant interfaces.

Solution – Primary Fix

Retry mount and confirm with mount | grep nfs plus read/write test operations.

Solution – Alternative Approaches

Ensure mount persists across reboot and no new AVC denials are generated.

Verification & Acceptance Criteria

Revert boolean changes if they violate policy and redesign export permissions.

Rollback Plan

Document SELinux and firewall requirements for all NFS-backed workloads.

Prevention & Hardening

Alert on rpcbind or nfs-server failures and mount unit errors in systemd.

Related Errors & Cross-Refs

Apply NFS client/server hardening with RHEL system roles and policy-managed exports.

Related tutorial: View the step-by-step tutorial for rhel-9.

View all rhel-9 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Review RHEL 9 SELinux and NFS administration documentation for secure operation.