ServerAlias 這個參數還滿好用的, 之前還傻傻地用了多個 VirtualHost block 來表示.
<VirtualHost *>
ServerName server.domain.com
ServerAlias server server2.domain.com server2
...
</VirtualHost><VirtualHost *:80>
ServerName pool.ntp.org
ServerAlias *.pool.ntp.org
Redirect permanent / http://www.pool.ntp.org/
</VirtualHost>