On 18 Jul 2008, at 15:30, Jason Carson wrote:
...
I want to setup a wireless router for the first time using WPA. Here is
the setup I want...

Internet---Gentoo Wireless Router---My Computer

I have configured my kernel properly from what I can tell and emerged
madwifi. However when I modprobe ath_pci nothing shows up. When I do
ifconfig -a I get...
....

Hi there,

I assume you've read
http://gentoo-wiki.com/HOWTO_Building_a_Wireless_Access_Point ?

When I wrote this I was using a Prism54 card, not an Atheros-based one. I have used Atheros since (and would as a matter of choice), but it appears I never got around to updating the wiki (and I won't update it in the future because, basically, maintaining wikis is a lot of work). Further reading reveals inaccuracies in the current article.

Madwifi requires an extra step when creating the interface:

  wlanconfig ath0 create wlandev wifi0 wlanmode ap

  http://madwifi.org/wiki/UserDocs/SimpleAccessPoint

IIRC you can do this in your modprobe or udev rules (preferable), or as a preup stage in /etc/conf.d/net IIRC a udev (??) rule is created automagically when you first create the interface and it's this you can edit to make it so that it automatically comes up as an AP, rather than in client mode.

You state that "However when I modprobe ath_pci nothing shows up", but the interface HAS come up - it's shown as wifi0 in the ifconfig output you post. I don't use WPA but when using WEP (which I would advise you to get working first) you then have to:

  ifconfig wifi0 up
  iwconfig wifi0 mode Master essid foobert channel 11
  iwconfig wifi0 essid foobert channel 11 key aabbccdd

(or, obviously, the equivalent in /etc/conf.d/net - this is well documented in /etc/conf.d/net.example)

Anyway, Google "madwifi master mode" should give you plenty of fodder to get things up on a one-off basis using manual commands so that you can see it's working. You then just have to figure out how to integrate what you've learned into the Gentoo bootscripts - hopefully Google "gentoo madwifi master mode" will help.

However my computer doesn't show a wireless network to connect too.

I assume you mean your OTHER, client, computer by this. When posting problems it helps to be as explicit as possible - for example when posting the ifconfig output it would've been beneficial to post EVERYTHING you did in order to get there.

Oh! Also, the great thing about the madwifi drivers is that you can great virtual APs - as long as they all have the same channel then you can have wifi0, wifi1 and wifi2 on the same card (just `wlanconfig ath0 create wlandev wifi1 wlanmode ap && wlanconfig ath0 create wlandev wifi2 wlanmode ap`). You can run one of these open, one as WEP and (presumably) one as WPA, bridging the secure networks with your wired LAN (for best integration) and NATting the open network using iptables (so you can give clients free or filtered internet access without having to worry about them accessing LAN services. This is useful if you have a Nintendo DS, which doesn't support WPA).

Please post back any problems.

Stroller.


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