Required open Port in a network for Box/Remote HUB (with sim card suspended)

1. The Box is not a server thus does not require to open any ports in your internal network,
2. The box communicates with remote servers, your firewall has to authorized communication with the box through:

• *.wattsense.com, TCP port 443 (HTTPS) and 19000
• *.amazonaws.com, TCP port 443 (HTTPS) and 8883 (MQTT)
• time1.google.com, UDP port 123 (NTP)
• Google DNS 8.8.8.8, UDP port 53

Please note that you cannot setup custom DNS.