How to enable NFSv3...

[Tronmech]

The NFS server package seems to be limited to NFSv2. This means that I can't access .iso files over 2GB on the linkstation.

[spiffyguy]

This is from another site, they describe installing the ipkg called unfs instead of nfs-server to get NFSv3

unfs3 - 0.9.22-1 - Version 3 NFS server

https://advanxer.com/2018/12/buffalo-linkstation-add-nfs-function-support-nfs-v3/

Worked for me! Used this repo to gain root SSH access and then installed the unfs package and it's working great connecting from an updated ProxMox server.

[svempa434]

Thanks, spiffyguy. I noticed that the Linux distributions have discontinued usage of NFS version 2. Worked like a charm.