Hello!

I want to set up home Internet-router with my old home computer. Now I have one notebook and intend to buy (later) another one. I'm not familiar with Linux networking so I need help.

Coming router (Desktop) has Internet-connection through pppoe protocol (I use rp-pppoe's pppoe-start script, but it's no longer important). Yesterday I have bought two new network cards. So, it's now there are three Ethernet interfaces on Desktop:
* eth0 - for pppoe use. It has internal address 10.19.62.31 (netmask 255.255.0.0);
* eth1 - for notebook connection. It has IP-address 10.14.0.1 (netmask 255.255.0.0);
* eth2 - for future use, not configured;

My Notebook has one network card eth0 configured with IP-address 10.19.59.192 (netmask 255.255.0.0);

At first I make sure that ip-forwarding is switched on:

--
# cat /proc/sys/net/ipv4/ip_forward
1
--

The next step was adding routes between Desktop and Notebook:

* On Desktop:
--
# route add 10.19.59.192 eth1
--

* On Notebook:
--
# route add 10.14.0.1 eth 0
--

Ping tests are OK.

But I don't know what should I do later... I know that default route in Notebook must use gateway to access Internet:
--
# route add default gw GATEWAY
--

I supposed that gateway is my Desktop computer:
--
# route add default gw 10.14.0.1
--

But it does't work :-(
Please, help me with this problem.

Thanks in advance.

Nikolay.

P.S. I don't use Windows more than 4 years. Only Linux. I undertake to set up home router mainly to look into Linux networking basics. For purity of my experiment I use Slackware Linux 11.0 in my router (Desktop) (kernel 2.6.17.11 - from kernel.org). Notebook works under SUSE Linux 10 (kernel 2.6.17.11 - from kernel.org).

What I do is setup eth0 for the wan side. Define IP, Subnet, Gateway or setup as Dynamic DHCP.

Now on the eth1 lan side I setup say 192.168.1.1 IP and subnet 255.255.255.0. You can use other non routable IPs of your choice. But DO NOT define a gateway for this nic. This is what masquerading takes care of for you.

Then I goto here to get a good iptables firewall script generated answering the questions it ask. http://easyfwgen.morizot.net/gen/

Save the script to a file and ' chmod +x name_of_script '. Then as root you can run the command ' ./name_of_script '.

Brian

Brian,

Many thanks for your advices and (especially) for this link:

http://easyfwgen.morizot.net/gen/

Thanks to this link I've figured out, that my router configuration needs with NAT. And now I have right direction to resolve my problem.

Glad to see you are on your way and to be of help.

Brian