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Old 11-30-2003, 02:34 PM   #1
hamish
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Registered: Aug 2003
Location: Edinburgh
Distribution: Server: Gentoo2004; Desktop: Ubuntu
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ip routing table. getting network cards working


Dear all,

I have two PCI cards (eth1 and eth2) and a wireless card (eth0) in my Box. The wireless one isn't working yet.

At the moment eth1 is connected to the Internet, via a hub.

I would like to connect a second computer to my Box and let that computer access the hub via the Box. However, I cannot get this working.

My route -n looks like this:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
172.24.15.224 0.0.0.0 255.255.255.240 U 0 0 0 eth1
172.24.15.224 0.0.0.0 255.255.255.240 U 0 0 0 eth2
0.0.0.0 172.24.15.225 0.0.0.0 UG 0 0 0 eth1

I have no idea where to start with the IP routing table, frankly it just confuses me

Can you please help me and tell me what i need to do in order to get this setup working.

thank a lot
Hamish
 
Old 11-30-2003, 04:59 PM   #2
Mara
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Registered: Feb 2002
Location: Grenoble
Distribution: Debian
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The two lines:
Quote:
172.24.15.224 0.0.0.0 255.255.255.240 U 0 0 0 eth1
172.24.15.224 0.0.0.0 255.255.255.240 U 0 0 0 eth2
are wrong. You redirect the same subnet to two different interfaces.
If I understand you correctly, you can assign local IP address (like 192.168.0.1) to the second machine and second local IP (like 192.168.0.2; make sure they're differnet, but should be similar, like in the example above) to eth2. The you need to run masquerading on the machine. For masquerading you need a script. I recommend you to search this forum for 'iptables+masquerading'. You'll get hundreds of differnet scripts, for different security levels and different configurations. Choose the one that fits you best.
 
Old 11-30-2003, 05:58 PM   #3
jcookeman
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Registered: Jul 2003
Location: London, UK
Distribution: FreeBSD, OpenSuse, Ubuntu, RHEL
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You should be able to get this to work. It's called a bridge. This will be the easiest setup for you, probably.

http://www.tldp.org/HOWTO/Ethernet-B...ter-HOWTO.html

Or, do full NAT

http://www.tldp.org/HOWTO/IP-Masquer...WTO/index.html
 
  


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