IPTABLES rules to enable NFS share on a Redhat based Server.

Add the following rules to /etc/sysconfig/iptables with your favourite text editor.
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-A RH-Firewall-1-INPUT -m state –state NEW -p udp –dport 111 -j ACCEPT


-A RH-Firewall-1-INPUT -m state –state NEW -p tcp –dport 111 -j ACCEPT


-A RH-Firewall-1-INPUT -m state –state NEW -p udp –dport 892 -j ACCEPT


-A RH-Firewall-1-INPUT -m state –state NEW -p tcp –dport 892 -j ACCEPT


-A RH-Firewall-1-INPUT -m state –state NEW -p udp –dport 875 -j ACCEPT


-A RH-Firewall-1-INPUT -m state –state NEW -p tcp –dport 875 -j ACCEPT


-A RH-Firewall-1-INPUT -m state –state NEW -p udp –dport 662 -j ACCEPT


-A RH-Firewall-1-INPUT -m state –state NEW -p tcp –dport 662 -j ACCEPT


-A RH-Firewall-1-INPUT -m state –state NEW -p tcp –dport 2049 -j ACCEPT


-A RH-Firewall-1-INPUT -m state –state NEW -p tcp –dport 32803 -j ACCEPT


-A RH-Firewall-1-INPUT -m state –state NEW -p udp –dport 32769 -j ACCEPT

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Now restart the iptables service
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/etc/init.d/iptables restart“`

Now access the share from Client system.