We will adjust the NFSv3 export to provide /home/org as an NFSv4 export using AUTH_SYS "authentication". On your server,prepare the root pseudo-filesystem. We will use /home/org directory from last chapter Basic NFS setup, so I will make some changes, that you maybe don't need. Create the directory /exports, which is owned by user root and group root and has permissions 755, and bind mount /home/org to /exports/home/org

[root@security1 /]# mkdir /exports
[root@security1 /]# mkdir -p /exports/home/org
[root@security1 /]# vi /etc/fstab
/home/org /exports/home/org none bind 0 0
[root@security1 /]# mount -a

Modify your server to export /exports/home/org as /home/org using NFSv4.

[root@security1 /]# vi /etc/exports
/exports 192.168.0.0/24(rw,sync,fsid=0,crossmnt)
/exports/home/org 192.168.0.0/24(rw,sync)
[root@security1 /]# exportfs -vr

On client side modify /etc/fstab according to this:

192.168.0.120:/home/org /home/org nfs4 defaults 0 0
[root@security2 ~]# mount -a

On client side modify /etc/fstab according to this:

192.168.0.120:/home/org /home/org nfs4 defaults 0 0

Now you can ssh nfsuser@security2, you should watch for owner in directory after ssh. If it is nobody, you should restart your machine, because it is possible to client has outdated mappings and needs to be flushed.