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Old 02-15-2003, 06:48 PM   #1
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IPTABLES, NAT & Firewall

I am trying to configure a simple firewall. I want to have the firewall use NAT to translate the internal address to public. This will need to happen in both directions. All servers will reside behind the firewall. I will create holes in the firewall to allow traffic to each port. Simple huh!!!

Well I've been trying for 2 weeks and need a lot of help. Can someone send me a sample. I am using Slackware 8.1 kerneral 2.4.19. and IPtables 1.2.6a

My internal interface is:
My external interface is:

All servers will be -
Web Server will be located at

I would like to block everything inbound else port 80, 110, 25 etc.
Old 02-15-2003, 08:14 PM   #2
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Registered: Jun 2002
Location: Northern VA, USA
Distribution: Ubuntu
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The following web site might prove helpfull. A detailed explanation of iptables and a good rc.firewall script example.


You can also do a search on LQ using "rc.firewall" and restrict to the Slack forum for some previous posting of scripts. Or let it search the entire site and get several pages of possible information targets. That later is how I turned up the link above.

But it sounds like what you desire is often called simply, port forwarding.


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