The Xiaomi Mesh System BE3600 Pro does not support VPN clients and servers. A VPN, or Virtual Private Network, is used to create a secure and private connection to the internet by encrypting data traffic, often to bypass geographic restrictions or maintain privacy. While this router does not offer built-in VPN support, it provides other advanced security features, such as Xiaomi Family NetShield, which offers 24/7 protection against cyber threats. These features help ensure the safety and privacy of your network without the need for a VPN.