Hi @andrea! The VM is meant to be more turnkey and so routing traffic through a firewall requires a fair amount of technical skill because there needs to be some DNS trickery.
If you go to http://xyz.asuscomm.com/formList, you should see a list of forms.
<forms>
<form url="https://example.com/formXml?formId=encrypted-form">encrypted-form</form>
<form url="https://example.com/formXml?formId=all-widgets">All widgets</form>
<form url="https://example.com/formXml?formId=basic">basic</form>
</forms>
Instead of example.com, I bet you have the local IP. That's the problem. You'll need to change the Aggregate WAR inside the VM to use your asuscom address.
The most straightforward way is to SSH into the VM and edit Aggregate's settings. I've put an untested script at Changing Aggregate IP to URL - #4 by yanokwa that should give you the idea.
And if you can do all this, it may just be easier to do a normal install of Aggregate in a Tomcat/MySQL container.