DUT connecting... (127.0.0.1:9900) Failed connection to DUT 127.0.0.1:9900 Error: DUT RPC version mismatch. Expected: 7.11

Question

DUT connecting... (127.0.0.1:9900)

Failed connection to DUT 127.0.0.1:9900

Error: DUT RPC version mismatch. Expected: 7.11

When I change the localhost ip to other than 127.0.0.1 say 127.0.0.2 -> This error is not visible.
Why localhost says failed to connect? How to make it free ?
is it a windows firewall issue? Where to check and confirm it?

Thanks in advance

Answer 1

Hello there,

The localhost simulates a web server running on your computer. When the “localhost refused to connect” error appears, it is likely due to misconfigured port. Other common reasons include insufficient permissions and the Apache webserver not running properly.

Common causes that result in localhost refusing to connect:

The server is being blocked by the firewall.

Localhost doesn't resolve to 127.0.0.1.

Apache failing to run properly.

DNS failing to function.

The server is accessed from the wrong port.

The browser settings block the connection.

To solve the issue, identify the source of the error. The best way to do so it to test out each probable cause, starting from the most frequent ones.

Hope this resolves your Query !!

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