This is a summary of what Mr.Tony Perrie of involution.com fame has wriiten. I include here with his permission. I encourage you to visit his site because he has a great "how-to" on IPtables.
The stock kernel driver to use with the WPC11 is the orinoco_cs. Make sure that it's loaded.
| modprobe orinoco_cs | 
If you get some error messages after executing modprobe, insure that the wavelan_cs and wvlan_cs drivers are unloaded. By doing
| lsmod | egrep lan | 
If they are loaded do the following:
| rmmod wavelan_cs | 
and
| rmmod wvlan_cs | 
The hack is putting the following in
| /etc/pcmcia/hermes.conf. | 
card "Instant Wireless Network PC Card"
manfid 0x0274,0x1613
bind "orinoco_cs"