title: Unable to SSH into Vagrant guest
body: <p>Until recently I was able to SSH into my Vagrant machine without any problems. Now however:</p>
  
  <p><code>
  $ ssh -vvv vagrant@127.0.0.1 -p 2222
  OpenSSH_7.2p2 Ubuntu-4ubuntu2.1, OpenSSL 1.0.2g  1 Mar 2016
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: Applying options for *
  debug2: resolving "127.0.0.1" port 2222
  debug2: ssh_connect_direct: needpriv 0
  debug1: Connecting to 127.0.0.1 [127.0.0.1] port 2222.
  debug1: Connection established.
  debug1: key_load_public: No such file or directory
  debug1: identity file /home/user1/.ssh/id_rsa type -1
  debug1: key_load_public: No such file or directory
  debug1: identity file /home/user1/.ssh/id_rsa-cert type -1
  debug1: key_load_public: No such file or directory
  debug1: identity file /home/user1/.ssh/id_dsa type -1
  debug1: key_load_public: No such file or directory
  debug1: identity file /home/user1/.ssh/id_dsa-cert type -1
  debug1: key_load_public: No such file or directory
  debug1: identity file /home/user1/.ssh/id_ecdsa type -1
  debug1: key_load_public: No such file or directory
  debug1: identity file /home/user1/.ssh/id_ecdsa-cert type -1
  debug1: key_load_public: No such file or directory
  debug1: identity file /home/user1/.ssh/id_ed25519 type -1
  debug1: key_load_public: No such file or directory
  debug1: identity file /home/user1/.ssh/id_ed25519-cert type -1
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.1
  ssh_exchange_identification: read: Connection reset by peer
  </code></p>
  
  <p>I checked <code>/etc/hosts.allow</code> and <code>/etc/hosts.deny</code> in the guest. Nothing there. I'm almost sure this has something to do with someone rewriting the contents of <code>/etc/resolv.conf</code>. The contents are now:
  <code>
  nameserver 8.8.8.8
  nameserver 8.8.4.4
  </code>
  The network seems to be fine on the host where I can ping google.com, but not on the guest, where I can't. But SSH to the Vagrant machine is no longer working. Any ideas?</p>