Hello, all.

I'm trying to connect via bastion host to ssh server.
Bastion host accepting key authentication. As second factor auth it consider TOTP password.
But when i use putty with Proxy command plink i see such error:

proxy: Further authentication required
proxy: Attempting keyboard-interactive authentication
proxy: Keyboard-interactive authentication failed
proxy: Access denied

I download latest stable putty.
If i run plink command from cmd - i get connection.

Full log:
Starting local proxy command: C:\Program Files (x86)\PuTTY\plink.exe -v user@xxx.xxx.xxx.xxx -nc yyy.yyy.yyy.yyy:22
proxy: Connecting to xxx.xxx.xxx.xxx port 22
proxy: We claim version: SSH-2.0-PuTTY_Release_0.70
proxy: Server version: SSH-2.0-OpenSSH_7.6
proxy: Using SSH protocol version 2
proxy: Server supports delayed compression; will try this later
proxy: Doing ECDH key exchange with curve Curve25519 and hash SHA-256
proxy: Server also has ssh-ed25519/ecdsa-sha2-nistp256 host keys, but we don't know any of them
proxy: Host key fingerprint is:
proxy: ssh-rsa 2048 [secured]
proxy: Initialised AES-256 SDCTR client->server encryption
proxy: Initialised HMAC-SHA-256 client->server MAC algorithm
proxy: Initialised AES-256 SDCTR server->client encryption
proxy: Initialised HMAC-SHA-256 server->client MAC algorithm
proxy: Pageant is running. Requesting keys.
proxy: Pageant has 1 SSH-2 keys
proxy: Using username "user".
proxy: Trying Pageant key #0
proxy: Authenticating with public key "xxx" from agent
proxy: Sending Pageant's response
proxy: Further authentication required
proxy: Further authentication required
proxy: Attempting keyboard-interactive authentication
proxy: Keyboard-interactive authentication failed
proxy: Access denied
proxy: Attempting keyboard-interactive authentication

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)