The building sounds to design a local network of 15 computers and 1 teaching, With that, the teaching staff should see all the PCs on the network, and the rest of the PCs have not seen it. I work in the Cisco Packet Tracer program, the Network has built everything, I do not understand how to make it not seen, and he saw it) I ask for help.

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    And what means seen? Could not establish a connection with him for example over TCP ?!

    If so then you need to close tcp syn from the side of user computers.

    This is done using the cisco ACL on the managed switches.

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      maybe it means what to teach for nat to place? - zb '
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      And I don’t see any point in such a perversion at all (hiding the teacher from the list of the network - as I understood it, this is what is meant in the task). Close from access to it (local firewall on the teacher's machine) - this can be understood. - Justicet
    • Thanks for the practical advice, but can you tell me in more detail how to do it all the more correctly, for example, can users put the users computer into a range? so that they do not see the teachers and which teams are better suited for this. I myself am new to this business, I want to understand - Truebosher
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      And why not do it with the OS. If the axis of the Win7 family and higher, simply cut down network detection in the general access parameters, if there are other axes, then specify which axis is on the teacher’s PC, and I would like to elaborate on decrypt the phrase “not seen”. - EgODiEz
    • @ Truebosher1 - we set up access to the teaching computer: 1) i.e. access to shared folders (if any) is strictly limited (remove "all", insert the necessary users); 2) in the firewall, allow remote control software (should the same teacher manage or monitor the network machines - if such a task is worth it) - ban everything else. well, etc. - Justicet