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Old 08-17-2003, 04:28 AM   #1
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Registered: Aug 2003
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Linux as a Router

I have set up a text only Linux box with two NIC's. The first is connected to an ADSL box and receives its address from it.
I would like to set the second card up so it services other machines on the network as a SAMBA server.
Then I need to be able to use the machine to route from the 1st NIC to the second.

Can anybody please advise as to where I may be able to find some info. on this topic?

Best Regards
Old 08-17-2003, 05:04 AM   #2
Registered: Oct 2002
Location: Ayrshire, Scotland
Distribution: Suse(home) RHEL (Work)
Posts: 263

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You need to look at two things here:

1. Firewall settings with iptables - to stop unwanted traffic
2. Masq'ing with NAT - to disguise your internal network.

Try this tutorial:

Also, do a search for 'linux iptables NAT tutorial' on your fave search engine.

For setting up SAMBA, I would recommend doing this first with no firewall installed (with no internet connection) so that you can troubleshoot this before you introduce any issues with NAT / firewall.

Let me know how you get on!

Old 08-17-2003, 11:23 AM   #3
Registered: Aug 2003
Location: Connecticut
Distribution: Mandrake, Debian
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Two points. First, from a security point of view, I'd recommend *not* setting Samba up on the firewall. The firewall really ought to be running on a machine by itself. Second, I'd recommend a book called Linux Firewalls, Second Edition, by Robert L. Ziegler (New Riders) as a really good reference for building firewalls with iptables.
Old 08-17-2003, 01:27 PM   #4
Registered: Aug 2003
Location: Connecticut
Distribution: Mandrake, Debian
Posts: 39

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Interestingly, there is a new HOW-TO on setting up a gateway and using Samba for authentication. Here's the URL at the Linux Documentation Project:


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