Lighttpd:

$HTTP["referer"] !~ "^($|http://.*\.(ri0day\.com|kissbye\.cn))" {      
　　$HTTP["url"] =~ "\.(jpg|jpeg|png|gif|rar|zip|mp3|swf|flv|wmv|rm|avi)$" {
　　　　url.redirect = (".*"    => "http://ri0day.blogbus.com/")
　　}
}
=============================================================
Nginx:

location ~* \.(gif|jpg|png|swf|rm|avi|wmv)$ {
valid_referers none blocked www.ri0day.com google.com;
if ($invalid_referer) {
rewrite ^/ http://ri0day.com/error.html;
}
}