internet connection sharing

I've been trying to get this going to have 2 connections in my room. I can't seem to get it to work.

My main computer is running Ubuntu Hardy. I have 2 nic cards. eth0 and eth1. eth1 is connected to the internet.

I have eth0 connected to a second computer running Ubuntu Interpid.

I've been trying to get the intrepid box to connect to the internet via my hardy box, to no avail.

I'm working through Firestarter, and when I get it configured, I try to start firestarter and it says "firestarter failed to start. device eth0 not ready"

Any idea what the problem might be?

I should also mention, I'm already behind a router that won't allow a static ip

OK, to get Hardy to pass traffic for Interpid you need to turn on FORWARD.
What does the configuration of all interfaces look like?
Could you post them here?

How do I turn on forward?

here's the output of my ifconfig from hardy (i assume/hope that's what you were looking for)

the eth0 is the one I'm trying to connect to the intrepid box. I plugged in an ip trying to get it to work, so that's why there's an address there.

Quote:

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eth0 Link encap:Ethernet HWaddr 00:10:5a:86:1c:b7
inet addr:192.168.2.3 Bcast:192.168.2.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:16 Base address:0xcf80

eth1 Link encap:Ethernet HWaddr 00:0b:6a:b7:ec:d5
inet addr:192.168.0.108 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::20b:6aff:feb7:ecd5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:17471 errors:0 dropped:0 overruns:0 frame:0
TX packets:16450 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:16819783 (16.0 MB) TX bytes:3340931 (3.1 MB)
Interrupt:19 Base address:0xec00

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1160 errors:0 dropped:0 overruns:0 frame:0
TX packets:1160 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:48720 (47.5 KB) TX bytes:48720 (47.5 KB)

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Forwarding is turned on like this:

Code:

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echo 1 > /proc/sys/net/ipv4/ip_forward

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Can you ping 192.168.2.3


I would say turn off the firewall for the eth0 port and make sure you have MASQ turned on. I never used firestarter so I can't help you much there. I configure my rules by hand.

Does firestarter place your rules into a file? If it does can you post that file?

also, make sure if the computers are directly connected that you are using a crossover cable, and not a standard ethernet cable

Quote:

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Originally Posted by coopstah13

also, make sure if the computers are directly connected that you are using a crossover cable, and not a standard ethernet cable

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That might be the problem right there. I wasn't aware there was a difference