Can you try yet another client? Maybe OpenSSH?
- martin
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- asdrbaqwe
I tried using PuTTY and encountered the same error
- martin
Re: Server refused public-key signature despite accepting key!
Can you authenticate to the server using the same credentials using any other SFTP/SSH client?
- asdrbaqwe
Server refused public-key signature despite accepting key!
Hi Team,
We are setting up a new connection to an external SFTP server using WinSCP using an SSH key pair. The key pair was also generated using PuTTYgen with an RSA 2048 protocol. Our server setup was a Windows Server 2012 R2 datacenter and it was to an AWS Network Load Balancer.
Version in use.
WinSCP 6.3.3
PuTTY 0.81
Here are the logs.
We are setting up a new connection to an external SFTP server using WinSCP using an SSH key pair. The key pair was also generated using PuTTYgen with an RSA 2048 protocol. Our server setup was a Windows Server 2012 R2 datacenter and it was to an AWS Network Load Balancer.
Version in use.
WinSCP 6.3.3
PuTTY 0.81
Here are the logs.
. 2024-12-08 22:55:14.382 --------------------------------------------------------------------------
. 2024-12-08 22:55:14.382 WinSCP Version 6.3.3 (Build 14916 2024-04-16) (OS 6.3.9600 – Windows Server 2012 R2 Datacenter)
. 2024-12-08 22:55:14.382 Configuration: HKCU\Software\Martin Prikryl\WinSCP 2\
. 2024-12-08 22:55:14.383 Log level: Debug 2
. 2024-12-08 22:55:14.383 Local account: DIR\hzn_Batch
. 2024-12-08 22:55:14.383 Working directory: C:\Program Files (x86)\WinSCP
. 2024-12-08 22:55:14.383 Process ID: 13268
. 2024-12-08 22:55:14.383 Ancestor processes: ...
. 2024-12-08 22:55:14.383 Command-line: "C:\Program Files (x86)\WinSCP\WinSCP.exe"
. 2024-12-08 22:55:14.383 Time zone: Current: GMT-5, Standard: GMT-5 (Eastern Standard Time), DST: GMT-4 (Eastern Daylight Time), DST Start: 3/10/2024, DST End: 11/3/2024
. 2024-12-08 22:55:14.383 Login time: Sunday, December 8, 2024 10:55:14 PM
. 2024-12-08 22:55:14.383 --------------------------------------------------------------------------
. 2024-12-08 22:55:14.383 Session name: ST0009_accenture@st-ext-prd-us.ubs.com (Site)
. 2024-12-08 22:55:14.384 Host name: st-ext-prd-us.ubs.com (Port: 8022)
. 2024-12-08 22:55:14.384 User name: ST0009_accenture (Password: No, Key file: Yes, Passphrase: No)
. 2024-12-08 22:55:14.384 Tunnel: No
. 2024-12-08 22:55:14.384 Transfer Protocol: SFTP (SCP)
. 2024-12-08 22:55:14.384 Ping type: Off, Ping interval: 30 sec; Timeout: 15 sec
. 2024-12-08 22:55:14.384 Disable Nagle: No
. 2024-12-08 22:55:14.384 Proxy: None
. 2024-12-08 22:55:14.384 Send buffer: 262144
. 2024-12-08 22:55:14.384 Compression: No
. 2024-12-08 22:55:14.384 Bypass authentication: No
. 2024-12-08 22:55:14.384 Try agent: Yes; Agent forwarding: No; KI: Yes; GSSAPI: Yes
. 2024-12-08 22:55:14.384 GSSAPI: KEX: No; Forwarding: No; Libs: gssapi32,sspi,custom; Custom:
. 2024-12-08 22:55:14.384 Ciphers: aes,chacha20,aesgcm,3des,WARN,des,blowfish,arcfour; Ssh2DES: Yes
. 2024-12-08 22:55:14.384 KEX: ntru-curve25519,ecdh,dh-gex-sha1,dh-group18-sha512,dh-group17-sha512,dh-group16-sha512,dh-group15-sha512,dh-group14-sha1,rsa,WARN,dh-group1-sha1
. 2024-12-08 22:55:14.384 SSH Bugs: Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto
. 2024-12-08 22:55:14.384 Simple channel: Yes
. 2024-12-08 22:55:14.384 Return code variable: Autodetect; Lookup user groups: Auto
. 2024-12-08 22:55:14.384 Shell: default
. 2024-12-08 22:55:14.384 EOL: LF, UTF: Auto
. 2024-12-08 22:55:14.384 Clear aliases: Yes, Unset nat.vars: Yes, Resolve symlinks: Yes; Follow directory symlinks: No
. 2024-12-08 22:55:14.384 LS: ls -la, Ign LS warn: Yes, Scp1 Comp: No; Exit code 1 is error: No
. 2024-12-08 22:55:14.384 SFTP Bugs: Auto,Auto
. 2024-12-08 22:55:14.384 SFTP Server: default
. 2024-12-08 22:55:14.384 Local directory: default, Remote directory: home, Update: Yes, Cache: Yes
. 2024-12-08 22:55:14.384 Cache directory changes: Yes, Permanent: Yes
. 2024-12-08 22:55:14.384 Recycle bin: Delete to: No, Overwritten to: No, Bin path:
. 2024-12-08 22:55:14.384 DST mode: Unix
. 2024-12-08 22:55:14.384 --------------------------------------------------------------------------
. 2024-12-08 22:55:14.404 Looking up host "st-ext-prd-us.ubs.com" for SSH connection
. 2024-12-08 22:55:14.477 Connecting to 161.239.82.213 port 8022
. 2024-12-08 22:55:14.487 Connected to 161.239.82.213
. 2024-12-08 22:55:14.487 Selecting events 63 for socket 3928
. 2024-12-08 22:55:14.518 Waiting for the server to continue with the initialization
. 2024-12-08 22:55:14.519 Looking for incoming data
. 2024-12-08 22:55:14.519 Looking for network events
. 2024-12-08 22:55:14.519 We claim version: SSH-2.0-WinSCP_release_6.3.3
. 2024-12-08 22:55:14.519 Detected network event
. 2024-12-08 22:55:14.519 Enumerating network events for socket 3928
. 2024-12-08 22:55:14.519 Enumerated 19 network events making 19 cumulative events for socket 3928
. 2024-12-08 22:55:14.519 Handling network write event on socket 3928 with error 0
. 2024-12-08 22:55:14.519 Handling network connect event on socket 3928 with error 0
. 2024-12-08 22:55:14.519 Connected to 161.239.82.213
. 2024-12-08 22:55:14.519 Handling network read event on socket 3928 with error 0
. 2024-12-08 22:55:14.519 Waiting for the server to continue with the initialization
. 2024-12-08 22:55:14.519 Looking for incoming data
. 2024-12-08 22:55:14.519 Looking for network events
. 2024-12-08 22:55:14.519 Remote version: SSH-2.0-SSHD
. 2024-12-08 22:55:14.519 Using SSH protocol version 2
. 2024-12-08 22:55:14.521 Have a known host key of type rsa2
. 2024-12-08 22:55:14.529 Detected network event
. 2024-12-08 22:55:14.529 Enumerating network events for socket 3928
. 2024-12-08 22:55:14.529 Enumerated 1 network events making 1 cumulative events for socket 3928
. 2024-12-08 22:55:14.529 Handling network read event on socket 3928 with error 0
. 2024-12-08 22:55:14.529 Waiting for the server to continue with the initialization
. 2024-12-08 22:55:14.529 Looking for incoming data
. 2024-12-08 22:55:14.529 Looking for network events
. 2024-12-08 22:55:14.529 Enabling strict key exchange semantics
. 2024-12-08 22:55:14.529 Doing ECDH key exchange with curve Curve25519, using hash SHA-256
. 2024-12-08 22:55:14.554 Detected network event
. 2024-12-08 22:55:14.554 Enumerating network events for socket 3928
. 2024-12-08 22:55:14.554 Enumerated 1 network events making 1 cumulative events for socket 3928
. 2024-12-08 22:55:14.554 Handling network read event on socket 3928 with error 0
. 2024-12-08 22:55:14.554 Waiting for the server to continue with the initialization
. 2024-12-08 22:55:14.554 Looking for incoming data
. 2024-12-08 22:55:14.554 Looking for network events
. 2024-12-08 22:55:14.610 Host key fingerprint is:
. 2024-12-08 22:55:14.610 ssh-rsa 2048 SHA256:Hl1O5bCKojwjqUTT5Bopsw320LEcYhSTm5E8zgOqmYc
. 2024-12-08 22:55:14.610 Verifying host key rsa2 0x10001,0xc0a50967a9f753a8 202fa954e5498a01 926fea92c12bc823 004e0c26a5c36eaf 9db90688e8257bc7 967498f3804261e3 dcfc0f2e0e551584 90ec802a78fb0950 a6d05e5dd256a2c0 81eb03165ea9ab7a 738403f7a31ad37d 35205ee1e93879a2 38dee51a1ebd63e5 1eb41de3fa6c9cde 60e9fcd9f4081802 6ea111093bdb1bf1 ddfeabb946fb176f 485eeeb868d93c8a d4b8bc5857836ae0 ca22e3cae4752e0e b95b3b17582454d7 29223208ccdd2aa4 5cb6477c36e8507e d8f12512dd2e6039 0a7e1d347e3e72da a27e341ff4965fc7 0bf1d3eb14a8d5ae 035b0d86ed98dae7 6d1e7dba9f591481 ec695a4aa10ce70a 616950389ea40ac6 bc94a76b59148c41 with fingerprints ssh-rsa 2048 SHA256:Hl1O5bCKojwjqUTT5Bopsw320LEcYhSTm5E8zgOqmYc, ssh-rsa 2048 80:5c:fc:8a:f9:4b:7e:52:63:4f:96:bd:1f:5a:29:2d
. 2024-12-08 22:55:14.613 Host key matches cached key
. 2024-12-08 22:55:14.613 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] outbound encryption
. 2024-12-08 22:55:14.613 Initialised HMAC-SHA-256 outbound MAC algorithm
. 2024-12-08 22:55:14.613 Initialised AES-256 SDCTR (AES-NI accelerated) [aes256-ctr] inbound encryption
. 2024-12-08 22:55:14.613 Initialised HMAC-SHA-256 inbound MAC algorithm
. 2024-12-08 22:55:14.624 Detected network event
. 2024-12-08 22:55:14.624 Enumerating network events for socket 3928
. 2024-12-08 22:55:14.624 Enumerated 1 network events making 1 cumulative events for socket 3928
. 2024-12-08 22:55:14.624 Handling network read event on socket 3928 with error 0
. 2024-12-08 22:55:14.624 Waiting for the server to continue with the initialization
. 2024-12-08 22:55:14.624 Looking for incoming data
. 2024-12-08 22:55:14.624 Looking for network events
. 2024-12-08 22:55:14.624 Reading key file "D:\Batch\Axway\VA106558_PrivKey120524.ppk"
! 2024-12-08 22:55:14.644 Using username "ST0009_accenture".
. 2024-12-08 22:55:14.658 Detected network event
. 2024-12-08 22:55:14.658 Enumerating network events for socket 3928
. 2024-12-08 22:55:14.658 Enumerated 1 network events making 1 cumulative events for socket 3928
. 2024-12-08 22:55:14.658 Handling network read event on socket 3928 with error 0
. 2024-12-08 22:55:14.658 Waiting for the server to continue with the initialization
. 2024-12-08 22:55:14.658 Looking for incoming data
. 2024-12-08 22:55:14.658 Looking for network events
. 2024-12-08 22:55:14.658 Server offered these authentication methods: publickey,password,keyboard-interactive
. 2024-12-08 22:55:14.658 Offered public key
. 2024-12-08 22:55:14.729 Detected network event
. 2024-12-08 22:55:14.729 Enumerating network events for socket 3928
. 2024-12-08 22:55:14.729 Enumerated 1 network events making 1 cumulative events for socket 3928
. 2024-12-08 22:55:14.729 Handling network read event on socket 3928 with error 0
. 2024-12-08 22:55:14.729 Waiting for the server to continue with the initialization
. 2024-12-08 22:55:14.729 Looking for incoming data
. 2024-12-08 22:55:14.729 Looking for network events
. 2024-12-08 22:55:14.729 Offer of public key accepted
! 2024-12-08 22:55:14.729 Authenticating with public key "rsa-key-20241205"
. 2024-12-08 22:55:14.953 Sent public key signature
. 2024-12-08 22:55:15.037 Detected network event
. 2024-12-08 22:55:15.037 Enumerating network events for socket 3928
. 2024-12-08 22:55:15.037 Enumerated 1 network events making 1 cumulative events for socket 3928
. 2024-12-08 22:55:15.037 Handling network read event on socket 3928 with error 0
. 2024-12-08 22:55:15.037 Waiting for the server to continue with the initialization
. 2024-12-08 22:55:15.037 Looking for incoming data
. 2024-12-08 22:55:15.037 Looking for network events
! 2024-12-08 22:55:15.037 Server refused public-key signature despite accepting key!
. 2024-12-08 22:55:15.058 Server refused public-key signature despite accepting key!
. 2024-12-08 22:55:15.058 Server offered these authentication methods: publickey,password,keyboard-interactive
. 2024-12-08 22:55:15.058 Attempting keyboard-interactive authentication
. 2024-12-08 22:55:15.068 Detected network event
. 2024-12-08 22:55:15.068 Enumerating network events for socket 3928
. 2024-12-08 22:55:15.068 Enumerated 1 network events making 1 cumulative events for socket 3928
. 2024-12-08 22:55:15.068 Handling network read event on socket 3928 with error 0
. 2024-12-08 22:55:15.068 Waiting for the server to continue with the initialization
. 2024-12-08 22:55:15.068 Looking for incoming data
. 2024-12-08 22:55:15.068 Looking for network events
. 2024-12-08 22:55:15.068 Prompt (keyboard interactive, "SSH server: Password Authentication", "Enter password for ST0009_accenture", "Password:")
. 2024-12-08 22:55:15.068 Prompting user for the credentials.