[Techtalk] ssh through dyndns & key authentication

[Anne Wainwright]

Hi, all,

I am having key trouble with accessing my office server from home via
ssh

When I first-time accessed the server via ssh from the office network
there was the usual of having to trust & accept the key offered for the
first time. This connection has worked fine for quite a while

I then set up dyndns, installed ddclient on the server, so that I
could access this from home without issues when the IP address changes.
Then, I am sure, I had to accept a key offered the first time that I
connected across the internet. Fine.

Now, this evening, a new key is offered with a 'fingerprint'. Where
does this new key come from? This is not the first time, I can accept
it but I now have a string of keys in 'known_hosts' on my client laptop
for connecting to the same and only server.

Am I getting a new key each time that I try to ssh through to the
server after an IP address change? I don't understand what is happening
here.

Any ideas, please?
Anne