NFSv2 Support Removed in Rocky Linux 9

Introduction

NFSv2 was completely removed in Rocky Linux 9. You must use Rocky Linux 8 if you desire NFSv2 support.

Problem

NFSv2 cannot be mounted or configured on Rocky Linux 9 because support for this version of NFS has been completely removed from both the kernel and the userspace.

Resolution

If you require NFSv2 support, the recommended solution is to migrate to Rocky Linux 8.10. This version includes support for NFS versions 2, 3, 4.0, 4.1, and 4.2. Rocky Linux 8.10 is fully supported and will remain so until May 31, 2029. CIQ offers further extended support for Rocky Linux 8.10 through its Long-Term Support (LTS) program.

While you can compile your own kernel for Rocky Linux 9 that supports NFSv2, CIQ doesn't recommend this.

Notes

NFSv2 was removed because it’s an outdated, insecure protocol limited to 32-bit file sizes, lacking modern features like ACLs, and strong authentication. Its continued support added unnecessary complexity and security risk, so both user-space tools and kernel support were dropped in favor of NFSv3 and v4. Users are encouraged to migrate to newer NFS versions.

References

Rocky Linux NFS Guide
Rocky Linux Support Timelines
Rocky Linux LTS from CIQ