Issues
******

.. highlight:: bash

No Connection - Firewall
========================

Check ``syslog`` to see if the connnections are being blocked by the
*Uncomplicated Firewall* (UFW):

  $ cat /var/log/syslog | grep UFW
  [UFW BLOCK] IN=eth0 . SRC=192.168.1.71 DST=192.168.1.69 . PROTO=TCP . DPT=22

To unblock SSL connections::

  ufw allow 22/tcp

Delay connecting
================

Reverse DNS
-----------

If you experience a delay when making an ssh connection (in my case, using SSH
keys), then it could be a `reverse DNS issue`_.  To solve the problem, I added
my IP address to the servers ``/etc/hosts`` file.

ssh-add
=======

Could not open a connection to your authentication agent
--------------------------------------------------------

According to `passwordless ssh`_, *your shell isn't running under ssh-agent*::

  exec ssh-agent bash
  patrick@buzz:~$ ssh-add

I am really not sure what the problem is here, but ``ssh-add`` is now working.

The agent has no identities
---------------------------

If ``ssh-add -L`` returns ``The agent has no identities``, then just run
``ssh-add``::

  $ ssh-add
  Identity added: /home/patrick/.ssh/id_rsa (/home/patrick/.ssh/id_rsa)


.. _`passwordless ssh`: http://ubuntuforums.org/archive/index.php/t-28213.html
.. _`reverse DNS issue`: http://serverfault.com/questions/289158/10-second-ssh-delay-prior-to-successful-login