All Dyson connected machine connect to the following ports on a router:

1. DHCP, DNS, mDNS, HTTP (Port 80)

mDNS need to be enabled on the router and closed as an external port for connection.

1. HTTPs (Port 443)
2. TCP (Port 443)
3. TCP (Port 1883) (Only required on local WiFi network)

If the router has any one of these three ports either hidden or closed, the machine may have trouble connecting to the home network.