Setup for NFS shares

Install packages for server

Install the required packages:

apt-get install nfs-kernel-server nfs-common portmap

Create the folder to share

mkdir /home/nfs

No need to change the permissions

Config shares

nano /etc/exports

/home/nfs 192.168.20.160(rw,no_root_squash,sync,no_subtree_check) # for a remote machine
/home/nfs 192.168.20.150(rw,no_root_squash,sync,no_subtree_check) # for the localhost itself

/etc/init.d/nfs-kernel-server reload

and

service nfs-kernel-server status / stop / start

to control and check the server NFS.

be carefull about the IPS's when eth0 and vmbr0 are not properly reconfigured: for the remote hosts the IP of the vmbr0 is required, for the localhost the IP of eth0 is needed into /etc/exports! “service nfs-kernel-server status” can show which machine is trying to connect.
No need to modify any parameters of the firewall!