internet sharing

h3llfire · #1 11th January 2006, 11:14 AM

Hi,

I want to share my internet connection with my room mate (i have two ethernet cards in my pc). I know that this can be done in Windoze by checking a box that says "Allow other network users to connect to network through this computer`s internet connection" and configuring the other pc`s ip and gateway. Now i would like to do the same thing in linux but I don`t have any idea on what to do. Any help would be appreciated.

I have dual boot FC4/Win XP installed on my box and my room mate has only Windoze.

Sorry if this is something very obvious but i had just recently switched to Linux.

giulix · #2 11th January 2006, 04:56 PM

Use firestarter or another firewall tool to configure iptables for you.

h3llfire · #3 11th January 2006, 05:03 PM

uhm...i`m not sure what you are talking about... the thing is that i have a computer running linux and i have one internet line. I have two ethernet cards, and I want to share that connection with the windoze box without having to buy a switch or hub.

I don`t know how to configure iptables, and i`m not even sure what iptables is.

Sebastian.

toonaken · #4 11th January 2006, 05:36 PM

Have you tried using a router? Just a simple solution you could try. XD

giulix · #5 11th January 2006, 06:58 PM

Ok. So, you can buy a crossover cable which is an inexpensive piece of junk with inverted wires that will allow you to connect your mate's machine to one of your NICs without the need of a hub/switch/router. Then install firestarter: as root, open a terminal window and type:

Code:

yum -y install firestarter

Firestarter's a tool that will allow you to configure network connection sharing pretty much as you would do on a windoze box.

h3llfire · #6 11th January 2006, 10:30 PM

Ok...thanks alot, it works! I would have never figured by my own that you can do this from firestarter, and that easily. Thank you, again.

)

Trek1701 · #7 21st January 2006, 11:00 PM

Hi,

Question: when I enable the firewall on firestarter should I disable the firewall that comes with fedora?

If so, when I disable I can't start iptables and receive an error.

thanks

giulix · #8 22nd January 2006, 02:17 PM

Quote:

Originally Posted by Trek1701

Question: when I enable the firewall on firestarter should I disable the firewall that comes with fedora?

Yes, the tools are mutually exclusive.

AHanbali · #9 23rd January 2006, 12:07 PM

you may try to edit rc.local in /etc/ folder to append these lines

# Load iptables NAT module when required
modprobe iptable_nat

## Clear NAT IPTables
iptables -t nat --flush

## Enable Nating
iptables -t nat -A POSTROUTING -o EXTETH -s INTERNALNET -d 0/0 -j MASQUERADE

EXTETH: is the interface wich connected to the internet.
INTERNALNET: the internal network subnet such as (192.168.1.0/24)

and

edit /etc/sysctl.conf by set the key net.ipv4.ip_forward to 1

then restart the linux box.

Trek1701 · #10 23rd January 2006, 08:21 PM

Thanks for the reply.

Ok, I have Firestarter orking and with the "share internet" option active.
I have a second box with dual boot FC4/XP. I'm able to share my files between the 2 boxes using samba.
However, even using firestarter in the main box, I don't get internet on the second box on both FC4 and XP.

As I said previously, I'm with the fedora's firewall disabled and when I try to start iptables I get an error ("iptables failed").

Do I really need of iptables? Is this the problem with sharing the internet?

Trek1701

Trek1701 · #11 23rd January 2006, 10:15 PM

AHanbali,

I've disabled firestarter, enabled fedora's firewall and edited "rc.local" as you said and aldo enabled the "ip forward" but my second box can't conect to internet...

AHanbali · #12 24th January 2006, 09:00 AM

please check

http://forums.fedoraforum.org/showth...647#post442647