NFS Mount Permission Denied on RHEL 9 Client

📖 ~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

mount.nfs reports access denied by server or permission denied during mount.

Environment & Reproduction

Server export restrictions, firewalld rules, SELinux labels, or wrong client CIDR.

Root Cause Analysis

On server: exportfs -v; on client: showmount -e and mount command output.

Quick Triage

Ensure nfs-server is running and required NFS services are allowed in firewalld.

Step-by-Step Diagnosis

Capture client-side denial output and server-side export listing.

Solution – Primary Fix

Capture updated /etc/exports rule and successful remount.

Solution – Alternative Approaches

Update /etc/exports with correct client subnet and options; run sudo exportfs -rav.

Verification & Acceptance Criteria

Allow services: sudo firewall-cmd –permanent –add-service=nfs && sudo firewall-cmd –reload.

Rollback Plan

Mount again: sudo mount -t nfs4 :/share /mnt/share.

Prevention & Hardening

Confirm read/write behavior and persistent mount via /etc/fstab test using mount -a.

Related Errors & Cross-Refs

Use explicit export ACLs and test changes from a staging client before production rollout.

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

Revert /etc/exports to previous backup and refresh with exportfs -rav.