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Linux - Networking This forum is for any issue related to networks or networking.
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Old 12-30-2005, 01:00 PM   #1
Registered: Jul 2003
Location: Gauteng, South Africa
Distribution: Windows XP, yup :D Will be back onto Ubuntu probably someday
Posts: 107

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Question Setting up gateway

I currently have a home network on, with a Linux machine on the network with eth0, having an ISDN connection to the Internet on ippp0. The linux machine is running Ubuntu "Breezy Badger" with an IP address of

I want to be able to forward all traffic from eth0 that is destined for the internet to ippp0, i.e. setup the machine as a gateway for the LAN to the Internet.

How do I do this? This is my routing table (with info masked by x), sorry bout formatting


Last edited by jamie_barrow; 12-30-2005 at 01:03 PM.
Old 12-30-2005, 01:58 PM   #2
Registered: Jan 2003
Distribution: many win/nix/mac
Posts: 259

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Your routing table should be fine. What you need to be looking at is setting up nat/masqerading with iptables.

This can be done with many different iptables/firewall setup proggies.

My favorite

All you have to do is follow the prompts and it will generate a iptables script for you.

Old 05-08-2007, 06:40 AM   #3
Registered: Jul 2003
Location: Gauteng, South Africa
Distribution: Windows XP, yup :D Will be back onto Ubuntu probably someday
Posts: 107

Original Poster
Rep: Reputation: 15
Hey, thanks for that link. I actually never got round to sharing my internet connection last time But now I got a new pc and its 64 bit and i cant find drivers for the usb modem, so I'm going to try the script that gets generated so I can use the internet on the 64 bit machine. I have about 12 days left to activate the machine, so it'll give me some motivation


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