Ad-Hoc Linux to Windows Network

Mr_C · 10-04-2005, 01:45 PM

OK heres the setup.

Homepc(with internet) ---------> my notebook

If I initiate the Ad-hoc from within linux(my notebook), the other system in windows finds it and connects just fine. I'm able to ping and everything. However what I want is to have the home system serving/initating the wireless so that I can just come home and connect. As it is I have to set it up on linux(my notebook), run accross to the other pc and connect it. I would like things the other way around; connect linux wireless to windows wireless network.

Starting basic I've set up an Ad-Hoc on the home system:
ip - 1.1.1.123
essid - abc
no encryption/wep

From windows I can connect to it and ping but in linux I can't. Heres what I tried config wise in linux:
iwconfig ath0 mode Ad-Hoc
iwconfig ath0 essid abc
ifconfig ath0 1.1.1.222

All pings fail.

Incidentally the above commands are what I use to 'serve' the ad-hoc from within linux.
Oh and another point worth mentioning is that under linux my ap is FF:FF:FF:FF:FF:FF i.e. broadcast address so of course logically it would work if I'm serving. Connecting to someone else(within linux) is the problem.

combatwombat · 10-05-2005, 05:16 AM

Windows firewall in the way?

Mr_C · 10-05-2005, 11:30 AM

nope, no firewalls enabled on any node.

short101 · 10-06-2005, 04:01 AM

so what you really need is the windows pc to act as a router, and then connect to it and use it as the gateway? shorewall or ipmasq etc for linux, dunno about windows..

Mr_C · 10-07-2005, 04:37 PM

ok lets rephrase the question:

how do you in Linux connect to an existing ad-hoc peer to peer network?

marquisdesade · 10-07-2005, 06:57 PM

This tutorial on basic IP masquerading might be of help: http://www.tldp.org/HOWTO/IP-Masquerade-HOWTO/

I used this to enable the following setup:

A - My linux laptop - connected to cable modem
B - Friend's laptop - Not connected (only 1 port for cable modem)

So I enabled Ad-Hoc mode on my wireless card, and used iptables to forward packets received by my wireless device (from the other laptop) to my ethernet card (and vice versa)... basically acting like a wireless router. I'm not totally sure this is what you're looking for... but what the hell

.

short101 · 10-07-2005, 09:50 PM

paste the output of ifconfig, iwconfig and route.

Mr_C · 12-27-2005, 09:58 PM

Just a followup as I've got things working.
I'm gonna assume that everyone has their drivers installed and configured
put this in a script

Code:

/sbin/iwconfig ath0 channel 1
/sbin/iwconfig ath0 rate 11M
/sbin/iwconfig ath0 essid youressid
/sbin/iwconfig ath0 key 1234567890
/sbin/ifconfig ath0 1.1.1.117                       #<comment this out if you are using dhcp>
/sbin/route add default ath0
/sbin/route add default gw 1.1.1.1             #<comment this out if you are using dhcp
/sbin/ifconfig ath0 down
sleep 2                                                             # for some reason you need a little delay for changes to be updated
/sbin/ifconfig ath0 up
/sbin/dhcpcd ath0                                         # of course if you're not using dhcp comment this out

It generally seems that you need to manually specify the rate and channel for ad-hoc networks to negotiate reliably.

You all may notice that I've left of specifying '/sbin/iwconfig ath0 mode ad-hoc'
The reason being for madwifi drivers you have to create the card for the operation type BEFORE doing the above commands eg I've made the following script ng-adhoc.sh

Code:

wlanconfig ath0 create wlandev wifi0 wlanmode adhoc
/sbin/ifconfig ath0 up
iwconfig ath0 mode ad-hoc

as opposed to 'wlanconfig ath0 create wlandev wifi0 wlanmode sta' for a infrastructure mode.

People using ndiswrapper will
1-replace 'ath0' with 'wlan0' <this should be obvious>
2-place '/sbin/iwconfig wlan0 mode ad-hoc' BEFORE you set the channel

Good Luck, hope this helps

Mr_C · 12-27-2005, 10:26 PM

Quote:

Originally Posted by marquisdesade

This tutorial on basic IP masquerading might be of help: http://www.tldp.org/HOWTO/IP-Masquerade-HOWTO/

I used this to enable the following setup:

A - My linux laptop - connected to cable modem
B - Friend's laptop - Not connected (only 1 port for cable modem)

So I enabled Ad-Hoc mode on my wireless card, and used iptables to forward packets received by my wireless device (from the other laptop) to my ethernet card (and vice versa)... basically acting like a wireless router. I'm not totally sure this is what you're looking for... but what the hell

.

Thanks, it would be ideal if I wasn't using windows to share the net. <thats the family pc, nuff said>

Cybergeek · 02-19-2009, 08:46 PM

I tried all this and I am still unable to connect to my Windows system. Pain in the but... I have a Windows ICS box with a wireless card and my Fedora Core X is not conecting like it is supposed to.

test009 · 07-26-2010, 05:10 AM

i had similar issue and searching for resolve now. If i will found some, then im post here.

tinoob · 03-02-2011, 07:46 AM

I am trying to do the same connection from FC14 wireless to a vista ad-hoc network with not luck.
Anyone has done that successfully?

it seems that the card is associating and connecting the the network but then it start a dhcpv4 transaction, which obviously fails because vista is not a dhcp server.
Is there anyway around the dhcp cycle?

Thanks