set up NAT (network address translation) on local server

[Christopher K. Johnson]

Tim wrote:
> On Thu, 2008-11-20 at 07:46 -0800, Antonio Olivares wrote:
>   
>> [root at localhost ~]# cat /etc/sysconfig/iptables                             
>> *nat                                                                        
>> :PREROUTING ACCEPT [1:233]                                                  
>> :POSTROUTING ACCEPT [0:0]                                                   
>> :OUTPUT ACCEPT [0:0]                                                        
>> -A POSTROUTING -s 192.168.1.0/24 -o eth0 -j SNAT --to-source 10.154.19.210  
>> COMMIT                                                                      
>> -A FORWARD -i eth1 -o eth0 -j ACCEPT  -A FORWARD -i eth0 -o eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT            
>> # manually added the changes 2008/11/20                                         
>> # Firewall configuration written by system-config-securitylevel                 
>> # Manual customization of this file is not recommended.
>> *filter
>> :INPUT ACCEPT [0:0]
>> :FORWARD ACCEPT [0:0]
>> :OUTPUT ACCEPT [0:0]
>> :RH-Firewall-1-INPUT - [0:0]
>> -A INPUT -j RH-Firewall-1-INPUT
>> -A RH-Firewall-1-INPUT -i lo -j ACCEPT
>> -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT
>> -A RH-Firewall-1-INPUT -p 50 -j ACCEPT
>> -A RH-Firewall-1-INPUT -p 51 -j ACCEPT
>> -A RH-Firewall-1-INPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT
>> -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
>> -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT
>> -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
>> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
>> -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
>> -A FORWARD -j REJECT --reject-with icmp-host-prohibited
>> COMMIT
>>     
>
> Shouldn't there be ONLY one "COMMIT" command at the end of the file?
> You've got two.
>
>   
No, there should be one COMMIT for each table, and he has *nat and 
*filter tables.

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