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I am able to connect to AWS Linux 2023 instance using PuTTY.

When connecting using WinSCP site information, I'm getting error:

Server refused our key. Authentication failed.

From WinSCP I can press Ctrl+P and it opens PuTTY properly. That indicates that connection info is valid.

How can I connect WinSCP to AWS server?

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Most likely your server needs rsa-sha2. And you are using up-to-date version of PuTTY, which supports rsa-sha2, but an obsolete version of WinSCP. The support for rsa-sha2 was added in WinSCP 5.20.

Please update to the latest version of WinSCP.

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i have found a solution. i have upgraded winscp. the problem got solved. now it is connected.

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  • Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.
    – Community Bot
    Commented Jun 27, 2023 at 9:26
  • Likely you needed rsa-sha2: winscp.net/tracker/1952
    – Martin Prikryl
    Commented Jun 27, 2023 at 10:47

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