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 From:  Claudio Castro <ccastro at unr dot edu dot ar>
 To:  Marc Infield <marc at infielddesign dot com>, m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] CENTOS 4 problem with 1:1 NAT
 Date:  Tue, 08 Nov 2005 12:29:22 -0300
Marc, Im having the same problem...I have a CENTOS 4 maill server...and 
it cant see the internet. Tell me if you have any news...I dont have no 
idea why is this hapening.


Marc Infield escribió:
> Hi,
> I'm mot very experienced with this stuff so I apologize in advance for 
> my ignorance.
> Does CENTOS not like NAT?
> I am having trouble doing 1:1 NAT with a CENTOS 4 server. The strange 
> part is right next to it is a Fedora FC3 server which works fine. I 
> have tried switching internal and external IPs on the CENTOS server 
> but it consistently looses it's connection with public internet the 
> moment I apply 1:1 mapping to it's IP.
> Here is some more information about my setup if you are still reading.
> I have M0n0wall 1.2 setup on a Soekris 4501 and the basic setup is 
> working.
> WAN - Static IPs (32 IPs)
> LAN - DHCP on the subnet
> Everything works great.
> I want to add a DMZ with a couple servers on the OPT1 interface. So I 
> set it up with the name DMZ and setup DHCP and static mapping for the 
> servers.
> DMZ interface setup
>    - DHCP on the subnet
>    - I mapped the two servers to fix IP address with static mapping by 
> mac number
>         CENTOS_4_server=>
>           and
>         fedora_FC3_server=>
> Still everything is fine, The servers are picking up the correct IP 
> address and they are able to get to the internet. When I do 1:1 NAT 
> mapping from a public IP within my assigned range the servers the 
> CENTOS server looses connectivity. The Fedora server is fine and 
> viewable from out side my network. I have tried assigning the CENTOS 
> server to different internal IPs and mapping it to different public 
> ones but the same thing happens.
> Any tips would be greatly appreciated.
> Thanks,
> -marc
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