I experienced the same problems, with the WRT54GL version 1.1.
I wasted an entire evening on fruitless attempts to apply access restrictions. But an update of the firmware solved these problems!
Firmware version 4.30.9 will allow you (at last) to apply access restrictions that do their job properly. As I have teenagers in the house, these restrictions are essential for me.
Unfortunately version 4.30.9 is still only available on the Linksys USA website, and only for version 1.0 of the WRT54GL router. But it can also be used in version 1.1 of the router, and in other countries as well. I checked this with the Linksys helpdesk. Version 4.30.9 is designed for both 1.0 en 1.1.
According to the Linksys helpdesk, the only difference between the USA version of the firmware and the European version, is that channels 12 and 13 are disabled in the USA version. This is because those channels are (in the USA) restricted for governmental use. These disabled channels will have no detrimental effect on the practical usability of the router in Europe.
Hope this helps some of you. I am a happy user now of this excellent apparatus. Additional advantage: it runs on Linux, which means it's stable, reliable, safe and tweakable!
Have fun, Pjotr.
Message Edited by pjotr123 on 03-07-200711:44 AM