For those using VSCode, you may meet need to set the  Remote.SSH: Use Local Server setting to false in the extension setting. You can search for  @ext:ms-vscode-remote.remote-ssh to find the plugin-specific settings.

If you are using Visual Studio Code with the Remote SSH extension, it will not recognise hosts with wildcards as defined in the previous SSH config file.

You may add append an explicit entry for the desired hosts in your ssh config file:

Host ecs-login hpc-login