[CentOS] Problems with 'iptables'

>From: Andrey B. Kiselev <mr.slonoboy at gmail.com>
>To: centos at centos.org 
>Sent: Friday, March 22, 2013 11:16 AM
>Subject: [CentOS] Problems with 'iptables'
 >
>Hello!
>
>Sorry if this question is already asked, but I not finding answer for it...
>I have server with CentOS 6.4, later it will be router for home network.
>
>When I tried tune iptables I have error:
>[root at gateway sysconfig]# iptables -t NAT -A POSTROUTING -o eth0 -j
>MASQUERADE
>iptables v1.4.7: can't initialize iptables table `NAT': Table does not
>exist (do you need to insmod?)
>Perhaps iptables or your kernel needs to be upgraded.
>
>iptables 1.4.7 (latest version), custom kernel 3.8.3. from kernel.org (too
>latest version)
>
>How to fix this error, it's desirable without rebuild kernel?
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===
Try lowercase 'nat' (instead of uppercase 'NAT').

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