DHCP using ral

Vilem Kebrt vilem.kebrt at gmail.com
Tue Jun 30 00:41:58 UTC 2009

Manolis Kiagias napsal(a):
> Robert Hall wrote:
>> I'm trying to set up a connection between an FBSD box and a wireless
>> access point. The background is that there's no security on this
>> network; as the person who set it up says, "You just start your
>> computer and it works!"
>> I have an XP box with a wireless NIC working, but I don't want to use
>> the XP box as the gateway for my personal lan to an insecure network.
>> On the XP box, if I point a browser to, I'm told that the
>> router is "WRT54GX2", which I take to be a popular Linksys router. I
>> don't have physical access to the router and I don't have the password
>> for the router.
>> I've got a wireless Linksys NIC that uses the ral driver facing the
>> wireless router. The NIC facing my lan uses the em driver and is
>> working fine. "uname -a" says FreeBSD 7.2-RELEASE #0. In rc.conf I
>> have
>>         ifconfig_ral0="DHCP"
>> After booting, if I ping, I get "no route to host" and I
>> have no lease file in /var/db. "ifconfig ral0" tells me that I have no
>> inet address associated with ral0, status is "no carrier", and the
>> ssid is an empty string. "dhclient ral0" sends a series of
>> DHCPDISCOVER messages, but I get no DHCPOFFER messages, and I get an
>> empty lease file. If I run "ifconfig ral0" again, inet is,
>> status is "associated", and ssid is the proper ssid for the wireless
>> router. "ifconfig ral0 list scan" gives the proper information for the
>> router.
>> At some point I did get a proper lease. I don't know when or how. I've
>> never had a usable connection to the router from the FBSD box, and
>> I've never had access to the nameservers listed in the lease. If I
>> rename the old lease file to dhcp.leases.ral0, and then run "dhclient
>> ral0", I send 3 DHCPREQUEST messages, 2 DHCPDISCOVER messages, 2
>> DHCPREQUEST messages, and 6 DHCPDISCOVER messages. dhclient tells me
>> that no DHCPOFFERs were received, and it binds to the address in lease
>> file, However, "ifconfig ral0" shows no inet address. I
>> still can't ping the router.
>> "ifconfig ral0 inet netmask" assigns the
>> specified values. Ping no longer tells me that there's no route to the
>> host, but I'm getting about 95% packet loss. "netstat -r" now shows
>> that link1 (ral0) is the gateway to I still don't have a
>> usable connection.
>> resolv.conf says "nameserver", which is the nameserver for
>> my personal lan. I can't nslookup URLs outside of my lan. If I
>> manually add the nameservers in the dhcp lease, I can nslookup
>> www.google.com. But ping has 100% packet loss.
>> /etc/hosts associates with localhost.krig.net, and
>> with stamfordbru.krig.net, which is correct for my lan.
>> I'm stumped. :)
>> I don't know if this is related; the XP box is telling me that the
>> router has no connection to the internet, but it obviously does have a
>> connection because the XP box can load web pages and I can use my
>> gmail account.
>> Thanks for any help.
> I happen to have a Linksys router (not the same model though) and a
> Linksys pci card that uses the ral driver. Never had any problems,
> though I am not using DHCP.
> Here are a few manual steps to try:
> First off, try setting the ssid on the command line:
> ifconfig ral ssid Myssid
Some wireless interfaces need to be gone UP by hand so set ssid by 
previous command and then execute
ifconfig ral0 up
> Execute ifconfig by itself, and see if you get an "associated" message.
> (you may have to wait a minute before you do) If you don't, chances are
> the following will do nothing
> dhclient ral0
> if this does not succeed, set an IP address manually:
> ifconfig ral0 inet netmask
> Before attempting to test the internet connection, add the router as
> nameserver in /etc/resolv.conf and don't forget to add the router's
> address as the default gateway:
> route add default 192.168.1.X
> >From my experience, the important part is to get the "associated"
> message after the initial ifconfig. Not much hope otherwise.
> As an afterthought, is the XP machine on while you are trying to
> connect? If they are too close they maybe interfering.
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