On 08/01/2010 12:50, Carmel wrote:
Assume three computers.

Computer 1 runs Windows with Putty installed
Computer 2&  3 run FreeBSD

Computer 1 runs Putty and creates a key that is installed on computer 2.
Computer 2 has a key that is installed on computer 3.

If someone were to use computer 1 via Putty to access computer 2, would
they then be able to access computer 3? If so, how could I prevent it
from happening?

I am not good at explaining things, so I hope you understand what I am 
referring to.


I would suggest protecting your keys with a passphrase, then the key alone is not enough to gain access to the machines.

Simply put - in order for someone to access computer 3 from computer 2, would be for computer 3 to have computer 2's public key. So if computer 2's private key can be accessed from computer 1, then yes access to computer 3 could be granted.
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