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Date:      Fri, 08 Jan 2010 13:05:45 +0000
From:      Daniel Grant <daniel@nullroutes.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: Accessing Computer
Message-ID:  <4B472DA9.6070701@nullroutes.com>
In-Reply-To: <BLU0-SMTP659DC317869C12ACBF24DA93700@phx.gbl>
References:  <BLU0-SMTP659DC317869C12ACBF24DA93700@phx.gbl>

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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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