How can I block a network with lighttpd?

view full story

http://unix.stackexchange.com – I already block some simple ip lighttpd but I want to block a whole network. I've problem to understand what is this network address for example and/or network? What is this /8 or /24 means? I use $HTTP["remoteip"] to add my ip I want to deny the access. (HowTos)