Have a Drobo storage unit? If you have ESET Smart Security Firewall enabled, you'll probably find Drobo Dashboard can't connect while the firewall is on even after adding all the required ports and services to ESET's rules from the Drobo online help site (http://goo.gl/iVKVU). After enabling the detailed logging in ESET, I found that ESET's firewall was flagging Drobo Dashboard as an intrusion attempt and blocked it. From the Drobo help page (http://goo.gl/iVKVU):