Accessing apps without DNS server
From Amahi Wiki
What to do if you cannot use your HDA as a DNS server.
Set the DNS of your client to the IP address of the Amahi server.
If that doesn't work edit you client host file.
Windows:
Linux:
For Ubuntu/Debian edit /etc/hosts
Insert you Amahi server address followed by the app address
Example:
192.168.5.25 joomla joomla.home.com