Apache vhosts config: Host Name instead of IP Address

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http://serverfault.com – I have a domain (example.com) hosted at an external provider. I directed the subdomain sub.example.com to my ubuntu server (12.04 with apache2). On my ubuntu server I have a vhost setup like this. The rest of the config is basically apache 2 standard: <VirtualHost *:80> ServerName sub.example.com ServerAlias sub.example.com ServerAdmin [email protected] DocumentRoot /var/www/sub.example.com ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel (HowTos)