I was aware of this possibility and this is the first project I've heard
of using it. As long as it is an added layer to the normal safeguards
it can only help.
On Fri, 2005-12-30 at 17:13, Ken Elliott wrote:
> Anyone used Doorman?
>
> http://doorman.sourceforge.net/
>
> The basic idea is called "Port Knocking". The firewall has all ports
> closed, but keeps an eye on what packets hit what ports. On my remote
> laptop, I hit certain ports, in a pre-arranged sequence. The firewall sees
> this and opens a port for inbound traffic from my IP address. When I drop
> the connection, the port is closed.
>
> More on the subject: http://www.portknocking.org/view/about
>
> I'm in the process of trying to build a very robust VPN, and this will allow
> me to keep the ports closed.
>
> Ken Elliott
>
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