RewriteEngine On

RewriteCond %{REQUEST_URI} ^/[0-9]{4,8}$ [OR]
RewriteCond %{REQUEST_URI} ^/today$
RewriteRule (.*) /index.php?data=$1 [L]

RewriteCond %{REQUEST_URI} ^/(plusnet|aaisp)(-[0-9]{4,8})?$
RewriteRule ([^-]*)(-(.*))? /index.php?mode=$1&data=$3 [L]

RewriteCond %{REQUEST_URI} ^/graph\.pl [OR]
RewriteCond %{REQUEST_URI} ^/median\.php
RewriteRule .* - [F]