Most 802.11g cards allow only Managed or Ad-Hoc modes. With the hostap Linux driver for Prism based wireless cards, the Master mode becomes available, allowing to run your own access point. I now have my central box (babaracus) as an access-point and the client laptops in Managed mode. This has severly increased throughput as I could usually only manage less than 1Mb but now can utilise the full 11. Using the userspace hostapd you can do clever things like Radius authentication and dynamic WEP keys, but I’ve not played with that yet. I’ve had a few problems (lock ups on an SMP and loss of clients after restarting the AP) but it’s early days yet.
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