Post a reply

Before posting, please read how to report bug or request support effectively.

Bug reports without an attached log file are usually useless.

Add an Attachment

If you do not want to add an Attachment to your Post, please leave the Fields blank.

(maximum 10 MB; please compress large files; only common media, archive, text and programming file formats are allowed)


Topic review


Can you post PuTTY command-line that you see in Windows Task Manager?

Putty Session Log:

2020-03-04 17:57:16 Looking up host "" for SSH connection
2020-03-04 17:57:16 Connecting to port 22
2020-03-04 17:57:16 We claim version: SSH-2.0-PuTTY_Release_0.72
2020-03-04 17:57:16 Remote version: SSH-2.0-OpenSSH_7.4
2020-03-04 17:57:16 Using SSH protocol version 2
2020-03-04 17:57:16 No GSSAPI security context available
2020-03-04 17:57:16 Doing ECDH key exchange with curve Curve25519 and hash SHA-256 (unaccelerated)
2020-03-04 17:57:16 Server also has ecdsa-sha2-nistp256/ssh-rsa host keys, but we don't know any of them
2020-03-04 17:57:16 Host key fingerprint is:
2020-03-04 17:57:16 ssh-ed25519 255 0e:37:b9:6c:b2:6e:9c:38:df:99:f7:4f:bd:53:d8:3f
2020-03-04 17:57:16 Initialised AES-256 SDCTR (AES-NI accelerated) outbound encryption
2020-03-04 17:57:16 Initialised HMAC-SHA-256 (unaccelerated) outbound MAC algorithm
2020-03-04 17:57:16 Initialised AES-256 SDCTR (AES-NI accelerated) inbound encryption
2020-03-04 17:57:16 Initialised HMAC-SHA-256 (unaccelerated) inbound MAC algorithm
2020-03-04 17:57:16 Using SSPI from SECUR32.DLL
2020-03-04 17:57:16 Trying gssapi-with-mic...
2020-03-04 17:57:16 Attempting GSSAPI authentication
2020-03-04 17:57:16 GSSAPI authentication request refused

i am using WINSCP Version 5.17.1 . Can you please tell me which verison you are using?

That works for me.
Make sure you have the latest version of WinSCP.
Post a PuTTY event log and use Windows Task Manager to check what command-line parameters were used to launch PuTTY.

Thanks Martin, it worked. Sameway i have tried with password but its again prompting password. Can you please help me on this also. Thanks in Advance.


Re: Launch putty from browser

You cannot specify PuTTY command-line switches in the URL. But you can use WinSCP advanced settings URL syntax:

Like this:

Launch putty from browser

Hi , I was trying to launch putty from browser and am using below command.


but when i try this i am getting host not found error. how can i user winscp ssh protocol for launching putty