Re: [Fab-user] EC2 host keys

[Patrick J McNerthney]

Jeff Forcier wrote:
> HI Pat,
>
> Yea, I get that part, I think the salient question here was confirming
> that these "new servers" are sitting behind the same IP and/or
> hostname, which is why from SSH's point of view, they appear to be the
> same server with a totally new host key. (I wonder if this is
> something that the EC2 folks have considered? Seems like a pretty odd
> problem to introduce.) Is that the case? Mostly just curious at this
> point, I've not used EC2 before.
>
>   
Yes, that is the case.

The way it works is that when an EC2 instance is created, an Internet 
accessible IP address (and DNS name) is assigned to it so that the owner 
of that instance can ssh into it to be able to use.  As you probably 
know, publicly accessible IPv4 Internet addresses are something of a 
precious resource, so Amazon rightly recycles no longer used IP 
addresses for new instances.  And the DNS names are just a form of the 
IP address, something like this:  ec2-174-129-177-66.compute-1.amazonaws.com

Thanks again,
Pat