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[Adam Lyall <1450085@xxxxxxxxxxxxxxxxxx>]

I was able to build updated deb packages of libssh 0.6.5 but the problem
still persists for me. I thought it would have fixed the issue as
0.6.4's changelog mentions a few ECDSA changes. Just to make sure I
"ssh-keygen -R HOST_WITH_ECDSA", accessed the host via SFTP in Dolphin
which worked, "ssh-keygen -R HOST_WITH_ECDSA" again, access the host via
ssh (which pulled in the ECDSA key), and then accessed via Dolphin's
SFTP again which failed. Any host of mine that does not use ECDSA works
fine so it does seem limited to ECDSA host keys.

Note that Ed25519 keys will fail as well as that requires libssh 0.7.0.

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https://bugs.launchpad.net/bugs/1450085

Title:
  kio_sftp can't connect to hosts after OpenSSH 6 has cached their ECDSA
  key

Status in kde-runtime package in Ubuntu:
  Confirmed

Bug description:
  This seems to be the KDE bug 270322 -
  https://bugs.kde.org/show_bug.cgi?id=270322, which is supposedly fixed
  upstream, in libssh, whose version 0.6.0 supposed to have this bug
  fixed.

  Ubuntu 15.04 ships libssh 0.6.3, but we still have the behavior that
  using Dolphin to access SFTP URLs, after using OpenSSH to cache the
  host's ECDSA key result in "The host key for this server was not
  found, but another type of key exists." error and inability to
  connect.

  The workaround details in the KDE bug works, so it seems like the same
  problem.

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