Once your NFS server is up and running the second thing you need to do is open the nfs related ports on your NFS server, so that clients on your network can access your NFS shares.  For that you need to open the below PORT No for both TCP/UDP.


Let's see how to configure your IPTABLES to open these ports

[root@nfs ~]# iptables -I INPUT -p tcp -s 192.168.85.0/24 -m state --state NEW,RELATED,ESTABLISHED --dport 2049 -j ACCEPT


[root@nfs ~]#iptables -I INPUT -p udp -s 192.168.85.0/24 -m state --state NEW,RELATED,ESTABLISHED --dport 2049 -j ACCEPT


[root@nfs ~]# iptables -I INPUT -p tcp -s 192.168.85.0/24 -m state --state NEW,RELATED,ESTABLISHED --dport 111 -j ACCEPT


[root@nfs ~]#iptables -I INPUT -p udp -s 192.168.85.0/24 -m state --state NEW,RELATED,ESTABLISHED --dport 111 -j ACCEPT

Now simply save the rules to IPTABLES and restart them.

[root@nfs ~]# /etc/init.d/iptables save


[root@nfs ~]# /etc/init.d/iptables restart

That's all now all the clients on your network can access NFS shares on your NFS server.

further reading: http://www.karlrupp.net/en/computer/nat_tutorial