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Re: port knocking

On 6/19/2018 10:30 PM, basti wrote:

On 19.06.2018 22:24, john doe wrote:
On 6/19/2018 10:04 PM, basti wrote:
I try use use port knocking and would be happy to do this in ssh config

To open the port I can use ProxyCommand with an wrapper script like

ProxyCommand bash -c 'wrapper.sh %h port1 port2 ... portX; nc %h %p'

so far so good.

But if I understand port knocking in the right way I must close the port
after disconnect?

I havened found a way for this like post-connect in ssh config.

Has anyone a suggestion how it can be implemented?

Any reasons why you can't let your firewall handle the port nocking

I open the port with iptables, and than? can you please explain?

I can only give you this:



From what I understand you don't need to close the ports after connection.

John Doe

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