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ssh_exchange problem? Could not open connection (4 posts)

  • Started 1 year ago by Barry O\'Brien
  • Latest reply 10 months ago from Jim Matthews
  • Barry O\'Brien Member

    I get this message when trying to connect:

    “SFTP connection to dfw-sftp.XXXXXXX.com could not be opened because the connection to the SFTP server could not be established or was lost.

    Try again, or contact the server administrator to verify that you can have the correct hostname, username, password, and authentication method, and that the server is running.”

    I'm copying and pasting the correct information from an e-mail from my client. He can get in.
    Up to this morning, I used Fetch, trial version, for years, even this morning, I downloaded a file from this same site, but a different username and password.

    This morning, I bought a licensed copy of Fetch, and installed it. Now I am having the rejections. I read on a 7 year old message on this message board that "one possibility is that your server's key may have changed, and that is the reason Fetch won't connect. " I tried to follow the suggested solutions, but the advice, "In the help window, search for "known hosts". did not produce "RSA host key differs warning" - nor would a direct search.

    It's definitely on my side. It
    's either a setting or possibly this comment in the old posting, "If the server's key changes and no longer matches the one stored on your Macintosh, this could indicate a security problem. Some programs ignore the error; Fetch instead refuses to make the connection."

    What could it be? Is there a cache I can clear and start over?

    Thank you in advance. I can send you screen grabs of my sign in and the message that comes back, if that would help.

    Barry

    Posted 1 year ago #

  • Jim Matthews Administrator

    Hi Barry,

    I saw that you contacted us by email as well. I'll answer you there.

    Thanks,

    Jim Matthews
    Fetch Softworks

    Posted 1 year ago #

  • Qiushi Bao Member

    I got the same message. and the server responded is ssh_exchange_identification: connection closed by remote host.
    I tried to clear the known hosts, but it still doesn't. Seems it happened suddenly, several minutes ago, I still can log in.
    here is what I tried in terminal:Last login: Wed Feb 7 18:52:54 on console
    wireless-10-105-71-85:~ qiushi$ ssh -v qbao@wrds.wharton.upenn.edu
    OpenSSH_7.5p1, LibreSSL 2.5.4
    debug1: Reading configuration data /etc/ssh/ssh_config
    debug1: /etc/ssh/ssh_config line 52: Applying options for *
    debug1: Connecting to wrds.wharton.upenn.edu [128.91.91.26] port 22.
    debug1: Connection established.
    debug1: key_load_public: No such file or directory
    debug1: identity file /Users/qiushi/.ssh/id_rsa type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /Users/qiushi/.ssh/id_rsa-cert type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /Users/qiushi/.ssh/id_dsa type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /Users/qiushi/.ssh/id_dsa-cert type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /Users/qiushi/.ssh/id_ecdsa type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /Users/qiushi/.ssh/id_ecdsa-cert type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /Users/qiushi/.ssh/id_ed25519 type -1
    debug1: key_load_public: No such file or directory
    debug1: identity file /Users/qiushi/.ssh/id_ed25519-cert type -1
    debug1: Enabling compatibility mode for protocol 2.0
    debug1: Local version string SSH-2.0-OpenSSH_7.5
    ssh_exchange_identification: Connection closed by remote host
    wireless-10-105-71-85:~ qiushi$

    May I ask what should I do?

    Posted 10 months ago #

  • Jim Matthews Administrator

    Hi,

    For whatever it's worth, I'm not seeing that problem with that server (I'm running macOS 10.13.3). I would contact the Wharton IT help desk for help with this issue.

    Thanks,

    Jim Matthews
    Fetch Softworks

    Posted 10 months ago #

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