Creating custom error pages using Apache is easy. Simply put
ErrorDocument 404 /errors/404.html
in your vhost-config or .htaccess and apache will serve your file instead of that ugly default message.
However, when you use a static file, requests to
/errors/404.html will now result in your er...
WPA2 with 802.1X ("Enterprise") is what you want to use to encrypt your WiFi when you have lots of users and thanks to the formidable Eduroam initiative most universities I visit (as well as my home university) now provide such a service.
When I'm on the road, I almost always take my Kindle with...