This is also known as adding it to the whitelist. You’ll need to know the MAC address for your Nest product so the IT administrator can unblock it. If you're connecting to a business network, but you’re having trouble, your IT administrator may have enabled MAC filtering.Connect to a network with MAC address filteringĪll Nest products can connect to networks that have MAC address filtering enabled, but the MAC address must be added to the network’s whitelist. Many businesses use MAC filtering on their networks, but some home networks do as well. MAC filtering is used as a security measure to prevent any unknown devices from joining the network. If you’re having trouble getting your Nest product to connect to your network, you may need to add its MAC address to your router’s whitelist. Like computers and other devices that connect to Wi-Fi, each of your Nest products has its own MAC address: a unique combination of letters and numbers a device uses to identify itself on a Wi-Fi network.