When NFS mounts, the solution for "Access denied by server while mounting" appears

MOUNT.NFS Failure resolution
Mount.nfs:access denied by server while mounting a workaround

1, permissions settings have a problem, in fact, the folder permissions are set to 777, the permissions are no problem, is the owner and the group, is correct.
[Email protected] ~]# ls-ld/data/
Drwxr-xr-x. 2 nfsnobody nfsnobody 4096 June 13:31/data/

2, Hosts.deny, and hosts.allow all leave the default settings.

3, the firewall is also closed, the settings are set, but still be rejected.

         [[email protected] ~]# getenforce

Disabled

[[email protected] ~]# grep "selinux="/etc/selinux/config

Selinux= can take one of these three values:

Selinux=disabled

[Email protected] ~]#/etc/init.d/iptables status
Iptables:firewall is not running.

4, Vim/etc/exports IP address range is not correct. 172.16.2.0/24 (Rw,sync)

When NFS mounts, the solution for "Access denied by server while mounting" appears