CentOS 6.2 (LiveCD Graphical install) Tinker machine PG
/etc/sysconfig/iptables

# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT

#manual nfs entries
#    the term "RH-Firewall-1-INPUT" did not work, I changed it to "INPUT" and that fixed it.
-A INPUT -s 192.168.0.0/24 -m state --state NEW -p udp --dport 111 -j ACCEPT
-A INPUT -s 192.168.0.0/24 -m state --state NEW -p tcp --dport 111 -j ACCEPT
-A INPUT -s 192.168.0.0/24 -m state --state NEW -p tcp --dport 2049 -j ACCEPT
-A INPUT -s 192.168.0.0/24 -m state --state NEW -p udp --dport 2049 -j ACCEPT
-A INPUT -s 192.168.0.0/24  -m state --state NEW -p tcp --dport 32803 -j ACCEPT
-A INPUT -s 192.168.0.0/24  -m state --state NEW -p udp --dport 32769 -j ACCEPT
-A INPUT -s 192.168.0.0/24  -m state --state NEW -p tcp --dport 892 -j ACCEPT
-A INPUT -s 192.168.0.0/24  -m state --state NEW -p udp --dport 892 -j ACCEPT
-A INPUT -s 192.168.0.0/24  -m state --state NEW -p tcp --dport 875 -j ACCEPT
-A INPUT -s 192.168.0.0/24  -m state --state NEW -p udp --dport 875 -j ACCEPT
-A INPUT -s 192.168.0.0/24  -m state --state NEW -p tcp --dport 662 -j ACCEPT
-A INPUT -s 192.168.0.0/24 -m state --state NEW -p udp --dport 662 -j ACCEPT
#manual nfs entries end

-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT

#ref:
#    http://www.cyberciti.biz/faq/centos-fedora-rhel-iptables-open-nfs-server-ports/
#    http://pario.no/2008/01/15/allow-nfs-through-iptables-on-a-redhat-system/