VSCode (on win10) keeps asking for ssh (to remote Ubutnu) password, ssh key is properly set up

Question

• I'm running VSCode (with remote develop) on Windows 10.

• I have generated a ssh key and want to use it to connect to remote server (Ubuntu) via SSH (instead of password).

• VSCode keeps asking for the password. For another server, with the same key, it works.

• The key is properly installed in the server. If I try to ssh via cygwin with the key, it works.

• The tab OUTPUT/Remote-SSH shows:

  > warning: agent returned different signature type ssh-rsa (expected rsa-sha2-512)warning: agent returned different signature type ssh-rsa (expected rsa-sha2-512)

Answer 1

Instead of plain ssh-keygen without arguments, use (for instance):

ssh-keygen -t ecdsa -b 521

Apparently the problem is created by three concurrent factors: (1) outdated ssh client shipped with windows, (2) the newer versions of the server in modern Linux, (3) using the standard rsa key generated by default by ssh-keygen. It's also reproducible from the windows command line calling ssh.

Another option is to manually overwrite the openSSH binaries under System32

Source