Go here:-
http://dsldevice/cgi/b/_wli_/cfg/?ce=1&be=0&l0=3&l1=1&name=WLAN:
Set "Allow New Devices" to "New stations are allowed (via registration)". Click Apply.
Once you've done this, click "Search for Wireless Devices" and whilst the progress bar is displayed, connect your wireless devices and this will register them in the ACL (Access Control List). As far as I know, there isn't an area on the web interface where you can simply type the MAC address of accepted machines.
If you want to type the MACs manually, rather than use the "Search for wireless devices", then telnet into the router and do this to display currently registered devices:-
:wireless macacl list
And this to add new devices to the ACL:-
:wireless macacl add
Setting Different DNS Server Addresses within the Router (if Be*'s DNS servers are too slow, and you would rather not reconfigure each of your PCs)
Flushing DNS Servers assigned by DHCP (and any you have previously added manually):-
:dns server route flush
Setting Primary & Secondary DNS servers:-
:dns server route add dns=[Insert Primary DNS Server Address here] metric=1 intf=RoutedEthoA
:dns server route add dns=[Insert Secondary DNS Server Address here] metric=1 intf=RoutedEthoA
When the router contacts DHCP again, the DNS addresses allocated will be below those you have added above (so your choice of DNS will be used first - if both your DNS servers are offline, then it should attempt to use the Be* DNS).
To view the DNS servers:-
:dns server route list