Problems sharing internet connection

[jigarzon]

After using Mandrake for two years, I decided to try Fedora, and have recently installed FC4. After a week solving basic problems (video, audio, internet connection, even my mouse didn't work), now I'm a bit frustrated, I think that Mr Fedora hates me ...

I don't request to much: I have two NIC, a modem that connects to one of them, and the other NIC connects to another machine. I want to share my internet connection.

This configuration works ok under WinXP, and worked with Mandrake 10.1, just because these OS have wizards that do everything (I don't have big knowledges about networking).

I had my internet connection working, and followed a tutorial to share the connection. Now my internet connection doesnt work anymore.

I can activate both devices (eth0 is the internal NIC, and eth1 which connects to the modem), determine the IP information, but the connection does not work...

I really have no idea what's wrong, if I can renew my IP, then the connection should exist and work.... please help!

Thanks in advance!

[manishsingh4u]

I have the same configuration at my place. My eth0 is connected to the modem and eth1 with other computer. I am writing here what I did for myself and it works fine. Connect your eth0 to the modem for better understanding.
Okay here's the stuff....
edit your /etc/sysconfig/network, add this line to it

GATEWAYDEV="eth0"


Then on the Konsole, run these commands

/etc/init.d/network restart
iptables -P FORWARD ACCEPT
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward


If you don't have dhcpd in ur computer, run this command

yum install dhcpd

edit your /etc/dhcpd.conf (if it does not exist, create one)

ddns-update-style interim;
subnet 192.168.0.0 netmask 255.255.255.0 {
option routers 192.168.0.1;
option subnet-mask 255.255.255.0;
# replace x.x.x.x's here with your dns1 and dns 2)
option domain-name-servers x.x.x.x, x.x.x.x ;
range 192.168.0.2 192.168.0.253;
}

And please let me know if if works

[manishsingh4u]

Sorry, I forgot to add one command, please execute this on the obove computer

dhcpd


It should definitely work now

[jigarzon]

I made the same thing you say, but it still didn't work. I installed Firestarter and followed the wizard to share my internet connection ... after that it worked right, but i'm still disapointed of course!

Thanks anyway!

[manishsingh4u]

Yes, firestarter is a very nice utility to share it. It does the same procedure without our headacke. Anyway, I don't have anything else to say. See ya in some other threads. bye

[wizdom]

I just hd to add some feedback here....I was having the same exact problem. I did exactly the steps posted and it worked. I didn't even do the dhcp part.

I installed FC4 using the onlione walk thru "The Perfect Setup - Fedora Core 4" at http://www.howtoforge.com/perfect_setup_fedora_core_4

everything was fine except windows pc couldn't access outside (web)

followed the steps below and I was all set.

I did set one of the DNS address on the XP machine as the real one from my isp, and the other as my internal fedora box (192.168.0.1)

works perfect =)) thanks!!!!!

Originally Posted by manishsingh4u

I have the same configuration at my place. My eth0 is connected to the modem and eth1 with other computer. I am writing here what I did for myself and it works fine. Connect your eth0 to the modem for better understanding.
Okay here's the stuff....
edit your /etc/sysconfig/network, add this line to it

GATEWAYDEV="eth0"


Then on the Konsole, run these commands

/etc/init.d/network restart
iptables -P FORWARD ACCEPT
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward


If you don't have dhcpd in ur computer, run this command................

[Doritos]

Originally Posted by manishsingh4u

I have the same configuration at my place. My eth0 is connected to the modem and eth1 with other computer. I am writing here what I did for myself and it works fine. Connect your eth0 to the modem for better understanding.
Okay here's the stuff....
edit your /etc/sysconfig/network, add this line to it

GATEWAYDEV="eth0"


Then on the Konsole, run these commands

/etc/init.d/network restart
iptables -P FORWARD ACCEPT
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward


If you don't have dhcpd in ur computer, run this command

yum install dhcpd

edit your /etc/dhcpd.conf (if it does not exist, create one)

ddns-update-style interim;
subnet 192.168.0.0 netmask 255.255.255.0 {
option routers 192.168.0.1;
option subnet-mask 255.255.255.0;
# replace x.x.x.x's here with your dns1 and dns 2)
option domain-name-servers x.x.x.x, x.x.x.x ;
range 192.168.0.2 192.168.0.253;
}

And please let me know if if works

It works, until the system is rebooted
How do I make it permanent?

[piforever]

/sbin/service iptables save