title: SSH protocol v.1 is no longer supported
body: <p>Trying to scp files to my server like I've done every day for years... got this weird error today:</p>
  <pre><code>client$ scp filename.file server:/path/to/somewhere/
  SSH protocol v.1 is no longer supported
  client$ echo $?
  255
  </code></pre>
  <p>The file does not show up on my server like it would normally after running this command.</p>
  <p>This error only appears on scp commands. Using ssh to get into my server works fine.</p>
  <p>Has anyone seen this before? How do I go about debugging this? Here's some version info:</p>
  <pre><code>client$ ssh -V
  OpenSSH_8.2p1 Ubuntu-4ubuntu0.1, OpenSSL 1.1.1f  31 Mar 2020
  </code></pre>
  <pre><code>client$ apt show openssl
  Package: openssl
  Version: 1.1.1f-1ubuntu2
  </code></pre>
  <pre><code>server$ apt show openssh-server
  Package: openssh-server
  Version: 1:7.2p2-4ubuntu2.10
  </code></pre>
  <pre><code>server$ sshd -V
  unknown option -- V
  OpenSSH_7.2p2 Ubuntu-4ubuntu2.10, OpenSSL 1.0.2g  1 Mar 2016
  </code></pre>
  <p>(note that I've added hostnames &quot;client&quot; and &quot;server&quot; for clarity)</p>
  <p>In my sshd_config, it shows <code>Protocol 2</code></p>
  <pre><code>server$ cat /etc/ssh/sshd_config | grep Protocol
  Protocol 2
  </code></pre>
  <p>I'm running Ubuntu 16.04 on my server, which should have maintenance updates through today.</p>
  <p>Let me know if I should run any other operations. Server is local network only, but I still want to make sure it's hardened.</p>