(e.g., permission denied , RPC: Program not registered ) Configuring firewall rules for NFS traffic.

Older "Version 1.0" methods (like brute-forcing /etc/passwd or guessing export paths) are largely obsolete. Version 2.0 focuses on —all while preserving file metadata and ACLs.

Regularly audit your NFS exports ( /etc/exports ) to ensure only authorized hosts have access.

If you have specific questions about mounting scenarios,g., in /etc/exports )

Practical recommendation