Smartty – Cannot connect: LIBSSH2 returned LIBSSH2_ERROR_KEX_FAILURE

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  • September 5, 2016 at 15:59 #8973
    bucketsharpie
    Participant

    Hi I am having trouble connecting to newly updated pfSense 2.3.2-RELEASE

    I get an error: Cannot connect: LIBSSH2 returned LIBSSH2_ERROR_KEX_FAILURE with smartty.

    There was a recent change in pfSenses SSH server i believe

    https://doc.pfsense.org/index.php/2.3.2_New_Features_and_Changes#SSH_Daemon

    Is there a way to fix this on smartty?

    September 16, 2016 at 16:23 #9073
    gammamu
    Participant

    I think your issue is this: The PFSense release doc states that “disabled some older, weaker algorithms” then enumerates what is currently being used.

    In my experience, SmarTTY won’t work on anything newer or more secure than diffie-hellman-group-exchange-sha1 with hmac-sha1. Your application, and any hardened system, isn’t using either.

    SmarTTY’s kex, cipher, and MAC support is antique, unfortunately.

    I’d love to hear from the devs: When is an updated version coming out?!?

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