RHEL 9: NFS Mount Permission Denied

📖 ~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 client mount fails with permission denied or access denied by server.

Environment & Reproduction

Run `showmount -e ` and validate client IP and export options.

Root Cause Analysis

Confirm client and server tools with `dnf list installed nfs-utils`.

Quick Triage

Verify `systemctl status nfs-server` on server and `rpcbind` availability.

Step-by-Step Diagnosis

Inspect both sides with `journalctl -u nfs-server -b` and client kernel logs.

Solution – Primary Fix

Adjust `/etc/exports`, run `exportfs -ra`, then remount client share.

Solution – Alternative Approaches

Open required NFS services in `firewalld` zones on server and client networks.

Verification & Acceptance Criteria

Set correct NFS booleans/contexts for exported paths when SELinux policy requires it.

Rollback Plan

Validate boot-time mount with `systemctl daemon-reload` and `mount -a` checks.

Prevention & Hardening

Use explicit CIDR-based exports and avoid wildcard rules in production.

Related Errors & Cross-Refs

Reapply previous `/etc/exports` backup and reload exports if new policy breaks clients.

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 `man exports` and RHEL storage networking documentation.