I'd like to support a CentOS 7 client from a Fedora 32 NFS4 server. Other Fedora 32 clients can mount the volume just fine using:
$ mount -t nfs4 my-server:/my-export-root/foo /foo
But when I try this from a CentOS 7 client, I get:
mount.nfs4: Operation not permitted
Is there any bit of configuration I can do on the client and/or server to make this work, short of allowing fallback to pre-4 NFS versions?