hi,
:smileyhappy:
a1: If u spekaing reagarding the (top-level login page) login page itself, You can change it an IP.
if you speaking regarding the welcome page,(not the login top-level page itself) yes,u may also change it to any welcome page(landing page) that you would like. the users/guests will be redirect to this page after a success login process. (just dont forget to add http:// in the begining of the url)
a2: Please take a look on this post (from a few days ago - same question like you - with really good answers - read all the way up to the end)
http://community.arubanetworks.com/t5/ArubaOS-and-Mobility-Controllers/Captive-portal-time-out-connection/m-p/68500#M7985
Have a gr8 week. :smileywink:
Me