Share Internet by crossover cable

kdar · 2009-12-12 00:41:56

How can I share Internet connection by crossover cable?

I have Ubutnu on my laptop. On there, wireless and everything works.

However I am trying to install Arch-linux on my main (desktop) PC. And there, during basic install, it can not detect my wireless connection.

How can I share connection from my laptop with my desktop?

How can I connect to the connect on my laptop from Arch?

Last edited by kdar (2009-12-12 21:42:34)

pyther · 2009-12-12 04:04:10

A bridge might be able to accomplish this, but I am not sure.

EDIT: I doubt a bridge will help you. I think you need IP masquerading

Last edited by pyther (2009-12-12 04:06:04)

eldragon · 2009-12-12 04:35:57

#!/bin/bash
# Shares internet from wlan0 through eth0

case "$1" in 
    start)
ifconfig eth0 up
ifconfig eth0 192.168.0.1
iptables --table nat --append POSTROUTING --out-interface wlan0 -j MASQUERADE
iptables --append FORWARD --in-interface eth0 -j ACCEPT
echo 1 > /proc/sys/net/ipv4/ip_forward
echo "set other computers in the range of"
echo "192.168.0.0 255.255.255.0"
echo "gateway 192.168.0.1"
echo "dns 192.168.10.1"  #this is my router's ip, you should use yours or another dns server
;;
    stop)
echo 0 > /proc/sys/net/ipv4/ip_forward
ifconfig eth0 down
iptables --table nat --delete POSTROUTING --out-interface wlan0 -j MASQUERADE
;;
    *)
echo "usage: $0 {start|stop}"
;;
esac

this does just that

check if iface names and ips fit your gear, the network between both computers connected with the x-over cable must be different from your router's lan network.

Last edited by eldragon (2009-12-12 04:42:35)

tomk · 2009-12-12 08:40:19

kdar wrote:

during basic install, it can not detect my wireless connection.

Everything you need to get your wifi connection up and running is included on th install iso/usb - you just need to set it up yourself.

zowki · 2009-12-12 16:02:58

eldragon wrote:

#!/bin/bash
# Shares internet from wlan0 through eth0

case "$1" in 
    start)
ifconfig eth0 up
ifconfig eth0 192.168.0.1
iptables --table nat --append POSTROUTING --out-interface wlan0 -j MASQUERADE
iptables --append FORWARD --in-interface eth0 -j ACCEPT
echo 1 > /proc/sys/net/ipv4/ip_forward
echo "set other computers in the range of"
echo "192.168.0.0 255.255.255.0"
echo "gateway 192.168.0.1"
echo "dns 192.168.10.1"  #this is my router's ip, you should use yours or another dns server
;;
    stop)
echo 0 > /proc/sys/net/ipv4/ip_forward
ifconfig eth0 down
iptables --table nat --delete POSTROUTING --out-interface wlan0 -j MASQUERADE
;;
    *)
echo "usage: $0 {start|stop}"
;;
esac

this does just that

check if iface names and ips fit your gear, the network between both computers connected with the x-over cable must be different from your router's lan network.

Wow! I got to try this out!

kdar · 2009-12-12 21:30:38

I got it working!! Thank you everyone for help.

But actually what I had to do is this:

iwconfig wlan0 enc my_key
iwconfig wlan0 essid "my_network_name"
dhcpcd eth1 -d

apparently my card works just fine... I just never connected to a network by terminal before.

Last edited by kdar (2009-12-12 21:42:23)

tomk · 2009-12-12 22:07:25

fyi - you can use a single iwconfig command i.e.

iwconfig wlan0 essid "my_network_name" enc my_key

And the -d flag for dhcpcd is only necessary for debugging.

kdar · 2009-12-12 22:56:57

tomk wrote:

fyi - you can use a single iwconfig command i.e.
iwconfig wlan0 essid "my_network_name" enc my_key
And the -d flag for dhcpcd is only necessary for debugging.

ah. thanks. I didn't know

kdar · 2009-12-13 02:28:55

How do I make it remember the key and network name with every boot?

tavianator · 2009-12-13 02:44:45

Have a look at netcfg.

zowki · 2009-12-13 08:03:02

I use wicd. It has a terminal client, wicd-curses.

kdar · 2009-12-13 17:14:24

What will work best for KDE4?

Arch Linux

#1 2009-12-12 00:41:56

Share Internet by crossover cable

#2 2009-12-12 04:04:10

Re: Share Internet by crossover cable

#3 2009-12-12 04:35:57

Re: Share Internet by crossover cable

#4 2009-12-12 08:40:19

Re: Share Internet by crossover cable

#5 2009-12-12 16:02:58

Re: Share Internet by crossover cable

#6 2009-12-12 21:30:38

Re: Share Internet by crossover cable

#7 2009-12-12 22:07:25

Re: Share Internet by crossover cable

#8 2009-12-12 22:56:57

Re: Share Internet by crossover cable

#9 2009-12-13 02:28:55

Re: Share Internet by crossover cable

#10 2009-12-13 02:44:45

Re: Share Internet by crossover cable

#11 2009-12-13 08:03:02

Re: Share Internet by crossover cable

#12 2009-12-13 17:14:24

Re: Share Internet by crossover cable

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