Our LAN is configured behind a load balancing router, in turn connected to a modem assigning public IPs to connected devices.
I am required to randomly test the connection effective throughput, bypassing the load balancing router, and this requires randomly to connect a laptop directly into the modem. This means the laptop will be given a public IP, exposing this computer to all possible risks. Testing sessions do not last more than 5 minutes. The computer is running Windows 10 1803.
Are firewalls such as Windows Firewall or Zone Alarm strong enough to keep the computer safe during this tests, avoiding computer remediation each time a test is performed?