# ping router <small> (it should ping the IP of the router; this ensures your HDA can see the router)</small>
# ping 68.180.206.184 <small>(this ensures you can see the rest of the world)</small>
# ping yahoo.com <small> (this ensures your dns server can see the world)</small># in the HDA itself (if you can), access Access http://hda</small>in a browser (or use curl in a terminal)
If the above does not work, try and fix it by double checking the settings.