It's possible to incorrectly set the network settings on your VortexBox. This can cause your VortexBox to not be accessible on your network.

To reset your VortexBox you will need to attach a monitor and keyboard to your VortexBox. Once you have done this power on your VortexBox.

You will get a login prompt where you can login with user root and password vortexbox

Then type

fix_network rebuild
reboot

this will set your VortexBox back to DHCP. You should now be able to get to it from your network.