[Cyberduck-trac] [Cyberduck] #11574: how to debug ssh failed connection

[Cyberduck]

#11574: how to debug ssh failed connection
-----------------------------+-------------------------
    Reporter:  todd.fischer  |      Owner:
        Type:  enhancement   |     Status:  new
    Priority:  normal        |  Milestone:
   Component:  core          |    Version:  7.8.2
    Severity:  normal        |   Keywords:  ssh
Architecture:  Intel         |   Platform:  macOS 10.15
-----------------------------+-------------------------
 Question: when an ssh connection fails, where do I find the log so I can
 see at which step the failure occurred?

 I have used cyberduck for years to move files up to my hostgator account.
 I recently upgraded to a cloud based account.  For some reason cyberduck
 gives me a "Listing directory / failed" error message.  I have cut the
 user name, IP address, and port number out of the cyberduck bookmark and
 pasted it into a  shell terminal session ssh command line parameters and
 everything works fine from the command line (shown below).

 I am at a loss as to how to debug what I am doing wrong with CyberDuck.

 Thanks for a great product.  I used CyberDuck nearly every day.

 Todd

 {{{
 bongo-osx:~ toddfischer$ ssh -v -p 2222 efcv4qc9 at 50.116.88.12

 OpenSSH_8.1p1, LibreSSL 2.7.3
 debug1: Reading configuration data /Users/toddfischer/.ssh/config
 debug1: /Users/toddfischer/.ssh/config line 1: Applying options for *
 debug1: Reading configuration data /etc/ssh/ssh_config
 debug1: /etc/ssh/ssh_config line 47: Applying options for *
 debug1: /etc/ssh/ssh_config line 51: Applying options for *
 debug1: Connecting to 50.116.88.12 [50.116.88.12] port 2222.
 debug1: Connection established.
 debug1: identity file /Users/toddfischer/.ssh/id_rsa type 0
 debug1: identity file /Users/toddfischer/.ssh/id_rsa-cert type -1
 debug1: identity file /Users/toddfischer/.ssh/id_dsa type -1
 debug1: identity file /Users/toddfischer/.ssh/id_dsa-cert type -1
 debug1: identity file /Users/toddfischer/.ssh/id_ecdsa type -1
 debug1: identity file /Users/toddfischer/.ssh/id_ecdsa-cert type -1
 debug1: identity file /Users/toddfischer/.ssh/id_ed25519 type -1
 debug1: identity file /Users/toddfischer/.ssh/id_ed25519-cert type -1
 debug1: identity file /Users/toddfischer/.ssh/id_xmss type -1
 debug1: identity file /Users/toddfischer/.ssh/id_xmss-cert type -1
 debug1: Local version string SSH-2.0-OpenSSH_8.1
 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
 debug1: match: OpenSSH_5.3 pat OpenSSH_5* compat 0x0c000002
 debug1: Authenticating to 50.116.88.12:2222 as 'efcv4qc9'
 debug1: SSH2_MSG_KEXINIT sent
 debug1: SSH2_MSG_KEXINIT received
 debug1: kex: algorithm: diffie-hellman-group-exchange-sha256
 debug1: kex: host key algorithm: ssh-rsa
 debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha2-256
 compression: none
 debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha2-256
 compression: none
 debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048<8192<8192) sent
 debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
 debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
 debug1: Server host key: ssh-rsa
 SHA256:O4CwSiIUGPvZLmNaN8p3KF51yu7p2WtpF9OsN2z7NU8
 debug1: Host '[50.116.88.12]:2222' is known and matches the RSA host key.
 debug1: Found key in /Users/toddfischer/.ssh/known_hosts:76
 debug1: rekey out after 4294967296 blocks
 debug1: SSH2_MSG_NEWKEYS sent
 debug1: expecting SSH2_MSG_NEWKEYS
 debug1: SSH2_MSG_NEWKEYS received
 debug1: rekey in after 4294967296 blocks
 debug1: Will attempt key: /Users/toddfischer/.ssh/id_rsa RSA
 SHA256:0cvOwYFhMu8oLWnC1CS9gpqftg1ByrafIQ5NJO18dUQ
 debug1: Will attempt key: /Users/toddfischer/.ssh/id_dsa
 debug1: Will attempt key: /Users/toddfischer/.ssh/id_ecdsa
 debug1: Will attempt key: /Users/toddfischer/.ssh/id_ed25519
 debug1: Will attempt key: /Users/toddfischer/.ssh/id_xmss
 debug1: SSH2_MSG_SERVICE_ACCEPT received
 debug1: Authentications that can continue: publickey,password,keyboard-
 interactive
 debug1: Next authentication method: publickey
 debug1: Offering public key: /Users/toddfischer/.ssh/id_rsa RSA
 SHA256:0cvOwYFhMu8oLWnC1CS9gpqftg1ByrafIQ5NJO18dUQ
 debug1: Server accepts key: /Users/toddfischer/.ssh/id_rsa RSA
 SHA256:0cvOwYFhMu8oLWnC1CS9gpqftg1ByrafIQ5NJO18dUQ
 debug1: Authentication succeeded (publickey).
 Authenticated to 50.116.88.12 ([50.116.88.12]:2222).
 debug1: channel 0: new [client-session]
 debug1: Requesting no-more-sessions at openssh.com
 debug1: Entering interactive session.
 debug1: pledge: exec
 debug1: Requesting X11 forwarding with authentication spoofing.
 debug1: Sending environment.
 debug1: Sending env LANG = en_US.UTF-8
 X11 forwarding request failed on channel 0
 Last login: Mon Feb  1 09:43:43 2021 from 63.227.129.129
 efcv4qc9 at fastcam.com [~]#
 }}}

--
Ticket URL: <https://trac.cyberduck.io/ticket/11574>
Cyberduck <https://cyberduck.io>
Libre FTP, SFTP, WebDAV, S3 & OpenStack Swift browser for Mac and Windows