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NAT: When inside address port is different from d outside 1

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  • NAT: When inside address port is different from d outside 1

    What really happens when i create a NAT entry such as this:

    inside address 10.0.0.5
    inside port 80

    outside address 0
    outside port 6666

    And I have apache listening at port 80.


    When a user connects to my outside IP does he need to specify port 6666? If yes, the packets from my webserver will travel from port 80 or from port 6666 as seens from the user?

    The reason y i'm asking this is that my ISP blocks any packets coming from the client computer's port 80. this means that I cannot have a webserver configured the 'normal' way...

    Is there still a way to go around this without letting the user specify a different port in his webbrowser?

    I need to understand what really happens when the inside/outside ports are different...

    thanks a lot
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