We recommend considering firewalls to avoid that anonymous client calls can reach the physical machine on other, non-relevant ports, and to reduce the security risk. The Windows based firewall is a built-in software firewall solution, that allows configuration of port-based traffic from within the operating system. On a standalone physical server or on any server without a hardware firewall connected to it, the Windows firewall will provide a level of protection against network-based attacks by limiting the attack surface only to the allowed ports. A hardware-based firewall is a professional and recommended solution that allows the server to perform the main computation tasks and actively offloading the server from the handling of the network traffic. Both solutions can be used to restrict the network traffic only to the allowed pathways. Finally, it should be ensured that the virtual network adapters used to connect the virtual switch have the appropriate security settings and limits applied.