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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?

  • Safe against what? What do you need to test? We need a lot more context. One could say that this entire site is dedicated to answering this question, so you are going to have to niche this question down. – schroeder Dec 13 '18 at 9:32
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    Use a firewall to block all incoming connections. Run anti-malware on the device. Do not connect the laptop to the inner network after exposing it to the Internet without nuking it first. – schroeder Dec 13 '18 at 9:36
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    Yes, that would be the point of nuking the computer. – schroeder Dec 13 '18 at 10:37
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    As you have no special requirements towards the computer running these tests, you could just use a raspberry pi or similar system, which is easy to nuke and/or cheap enough for just this task. – RoVo Dec 13 '18 at 13:47
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    Would there be a problem with taking out the hard drive and live booting, or even just installing on a flash drive, some well-tested version of Linux, like RHEL Dev? – xorist Dec 13 '18 at 14:16
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I don't believe the load balance router will induce any delay that would realistically change the result. The bandwidth of the router is without a doubt way larger than your internet connection.

You could just boot a live distribution on the laptop, connect it to the modem, and test several times the connection throughput. Save the results, reboot, connect the laptop on the load balance, do it again.

I would be surprised if the router influenced the result more than two average deviations.

  • It does. It is configured with multiple "classes" of priority, limitations, etc. The only way to test bandwidth is to unplug the router and hook a PC into the modem. – Riccardo Dec 16 '18 at 11:22
  • Measure it, you will see that the difference is not significant. If it is significant, call your technical support and ask them why your load balancer is slowing down the connection. – ThoriumBR Dec 16 '18 at 20:22

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