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Re: set up NAT (network address translation) on local server



--- On Thu, 11/20/08, Christopher K. Johnson <ckjohnson gwi net> wrote:

> From: Christopher K. Johnson <ckjohnson gwi net>
> Subject: Re: set up NAT (network address translation) on local server
> To: olivares14031 yahoo com, "Community assistance, encouragement, and advice for using Fedora." <fedora-list redhat com>
> Date: Thursday, November 20, 2008, 7:28 AM
> I would add the *nat through COMMIT before the existing
> *filter line.
> 
> I don't believe it matters as long as you do not mix
> them together.  But usually the *nat is much briefer than
> *filter, thus a good convention to put it first to find
> easily later.
> 
> Antonio Olivares wrote:
> > It seems that it does not contain those lines :(
> > 
> >   I will need to edit the file manually and save it. 
> Then try it again.
> > 
> > Regards,
> > 
> > Antonio   
> 
> 
> --   "A society grows great when old men plant trees
> whose shade they know
>   they shall never sit in" - Greek Proverb

How can I fix this?
I manually edited the file and I stopped service and now I get :

[root localhost ~]# gedit /etc/sysconfig/iptables &
[1] 7697                                           
[root localhost ~]# service iptables stop
iptables: Flushing firewall rules:                         [  OK  ]
iptables: Setting chains to policy ACCEPT: nat filter      [  OK  ]
iptables: Unloading modules:                               [  OK  ]
[1]+  Done                    gedit /etc/sysconfig/iptables        
[root localhost ~]# service iptables restart
iptables: Flushing firewall rules:                         [  OK  ]
iptables: Setting chains to policy ACCEPT: filter          [  OK  ]
iptables: Unloading modules:                               [  OK  ]
iptables: Applying firewall rules: Bad argument `COMMIT'           
Error occurred at line: 6                                          
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
                                                           [FAILED]         
[root 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
[root localhost ~]#

Thanks,

Antonio 


      


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