WILDCARD DNS?

[kurgans]

Wildcard

RewriteCond %{HTTP_HOST} ^www\.dominio\.com [NC]
RewriteRule ^(.*)$ HTTP://dominio\.com/$1 [R=301,L]
RewriteCond %{HTTP_HOST} ^([a-z0-9_-]+)\.dominio\.com
RewriteRule ^$ index.php?user=%1 [L]

/var/cache/bind/dominio.db
/etc/ispcp/bind/working/dominio.db

Reiniciar bind