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Configuring WEP on the Cisco Aironet PCMCIA adapters in Linux isn't as
straighforward as it should be. Here are some things to try if you
can't get your wireless card to associate to an access point that
requires WEP.
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Enter the WEP key in the following format: xxxx-xxxx-xx For
example:
$iwconfig eth1 key xxxx-xxxx-xx
This format should also be used if you're using RedHat's /etc/sysconfig/network-scripts/ifcfg-eth1.
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Make sure that you're using the Cisco airo driver. The recent RedHat
2.4.18 kernels don't make WEP work. Functionality in other distributions
depends on the airo driver version included with the kernel.
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Manually set the WEP key:
$echo "0 x:x:x:x:x:x:x:x:x:x" > /proc/driver/aironet/eth1/WepKey
$echo 0 > /proc/driver/aironet/eth1/WepKey
Of course, you should use the right interface name. I saw one laptop
that wouldn't let me set the wep key via iwconfig. After I set it
manually the first time, it worked fine with iwconfig afterward.
Go figure.
Here's another tip for RedHat users. I've found that
some systems don't like the standard ifup script for wireless and need
the Cisco acu program running before WEP will work. The following addition
to /etc/sysconfig/network-scripts/ifup-wireless should fix that:
if [ -n "$KEY" ] ; then
iwconfig $DEVICE key $KEY
+ iwconfig $DEVICE key on
else
iwconfig $DEVICE key off
fi
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