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If you need to re-configure the appliance, you must first reset it to the factory default, see Resetting the B1-212 . In addition, if you have not configured any NTP server or local DNS resolver, the appliance will use the Ubuntu NTP server (ubuntu.org - ubuntu Resources and Information. or ubuntu.pool.ntp.org) and BloxOne DDI DNS (IP: 52.119.40.100 or 103.80.5.100). Because these services do not communicate via an HTTPS proxy, you must ensure that the NTP port (UDP 123) and the DNS port (TCP/UDP 53) are open on your firewall.