title: SSH connection attempt hanging after "loaded 3 keys"
body: <p>I am attempting to establish a simple, password-controlled SSH connection but have encountered a hanging problem. The client terminal output is something like the following:</p>
  
  <pre><code>[d3pd@ppepc145 ~]$ ssh user@10.194.248.43 -v
  OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: Applying options for *
  debug1: Connecting to 10.194.248.43 [10.194.248.43] port 22.
  debug1: Connection established.
  debug1: identity file REDACTED/d3pd/.ssh/identity type -1
  debug1: identity file REDACTED/d3pd/.ssh/id_rsa type -1
  debug1: identity file REDACTED/d3pd/.ssh/id_dsa type -1
  debug1: loaded 3 keys
  </code></pre>
  
  <p>At this point, the client simple hangs.</p>
  
  <p>The corresponding server <code>/var/log/auth.log</code> log entry is as follows:</p>
  
  <pre><code>Jun 12 12:49:20 m93p sshd[7232]: Did not receive identification string from 194.36.1.172
  </code></pre>
  
  <p>I have verified that <code>sshd</code> is running:</p>
  
  <pre><code>d3pd@m93p:~$ ps ax | grep sshd
   7152 ?        Ss     0:00 /usr/sbin/sshd -D
   7301 pts/13   S+     0:00 grep --color=auto sshd
  </code></pre>
  
  <p>I have verified that the SSH server appears to be listening to the appropriate port (22) using <code>netstat -taupen</code>:</p>
  
  <pre><code>tcp6       0      0 :::22                   :::*                    LISTEN      0          227957      7152/sshd
  </code></pre>
  
  <p>What should I try in order to attempt to establish a simple, password-controlled SSH connection?</p>
  
  <p>The reported OpenSSH version of the server is <code>OpenSSH_6.6.1p1 Ubuntu-2ubuntu2, OpenSSL 1.0.1f 6 Jan 2014</code> and the reported OpenSSH version of the client is <code>OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008</code>.</p>