Forward a specific key to via the command line using ssh
<p>Is there a way to get the ssh-agent to forward a specific key not configured in <code>~/.ssh/config</code>. For example I am connecting to a host on ec2 like this:</p>

<pre><code>ssh -At -i ssh/insecure-deployer ec2-user@$bastion-instance-dns
</code></pre>

<p>or even connect directly to the instance behind my bastion instance like this:</p>

<pre><code>ssh -At -i ssh/insecure-deployer ec2-user@$bastion-instance-dns ssh ubuntu@target-instance-ip
</code></pre>

<p>What I'd like to do is have the agent forward the same key I'm using to connect to the bastion instance in this case, i.e. the <code>ssh/insecure-deployer</code> key, but it seems that only keys in ~/.ssh/config are being forwarded.</p>