I do not know what ssh_gatekeeper.sh does. But please note that WinSCP requires shell access, not just access to scp, as opposite to basic command-line SCP client.

See https://winscp.net/eng/docs/requirements#scp

Hello,

We have configured ssh with one time passphrase generation using script ssh_gatekeeper.sh. We have used ForceCommand to execute script which generate onetime passkey. User can enter passkey and can use ssh session. We have allowed scp using that script. It works fine with linux but not working with winscp. It says your shell is incompatible with the application (BASH is recommended). What should we do ? What changes require to make in winscp or script.

Regards
Jigar