In GNS3 Network Simulator, when we drag and drop some devices like Router, an error is issued. The error is ” Could not connect to 127.0.0.1 on port 8000: [WinError 10061] No connection could be made because the target machine actively refused it “.

It does not happen always but sometimes, maybe at the first start of GNS3 or sometime else refused by Antiviruses or Firewall software.

Unfortunately, it is not only on the Windows Operating system but I saw this error in Linux also.

How to fix GNS3 Errors on Windows?

So to fix the problem in the Windows system, just run the GNS3 as Administrator and continue your work. Now it must work correctly. If it’s not solved your GNS3 problems, just let us know and find out how to fix GNS3 errors

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