NFS issues
NFS permission denied
If you get an issue where you cannot mount you NFS share regardless of the permission options in you exports. Then put an entry in /etc/hosts, if that works your problem will be in /etc/nsswitch.conf
Edit /etc/nsswitch.conf
hosts files dns ipnodes files dns
make sure these two entries are as shown, what you want to look out for is "mdns" this is what is causing your NFS export to be denied.