We do not currently support IPv6. If the demand for IPv6 increases we will implement it in our products, however at the moment it is not necessary.
Check the power supply to ensure the thermostat is getting the proper voltage (about 24 volts). The red wire from the backplate and the red wire from the thermostat cable must both be in the R terminal. The black wire from the backplate and the common (color varies) wire from the thermostat cable must both be in the 24V(c) terminal.
This depends on what you are looking to do and what hardware you have. If you are using the StrongMesh/XBus system and would like to keep everything on a LAN, the Command Center would be your preferred solution. If you want to be able to access the Command Center from multiple places you can set up a VPN to the machine running the Command Center. Alternatively if you do not wish to setup a VPN and still want to be able to access your setup remotely you can sign up for the netx-web service.