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  1. Member
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    #1

    Default help with NAT terminology

    I understand how NAT works and the 3 types (static, dynamic and overload) but am confused at the terminology.
    Does anyone have a source (no pun intended) that would explain this in a way I can understand and remember it?

    Term Definitions

    Cisco defines these terms as:
    • Inside local address—The IP address assigned to a host on the inside network. This is the address configured as a parameter of the computer OS or received via dynamic address allocation protocols such as DHCP. The address is likely not a legitimate IP address assigned by the Network Information Center (NIC) or service provider.
    • Inside global address—A legitimate IP address assigned by the NIC or service provider that represents one or more inside local IP addresses to the outside world.
    • Outside local address—The IP address of an outside host as it appears to the inside network. Not necessarily a legitimate address, it is allocated from an address space routable on the inside.
    • Outside global address—The IP address assigned to a host on the outside network by the host owner. The address is allocated from a globally routable address or network space.

    I thought I understood this using this reasoning:
    Inside network is local private network and the host ip would be the local inside ip. Nat would translate it to a global inside ip. (public ip) It gets routed to a destination, that has an outside global ip (public ip) and nat on that side would translate it to an outside local ip (private ip). Is this wrong? It makes sense to me but seems to contradict the wording of outside global and outside local addresses above. Can anyone clarify?

    Thanks in advance.

    I'll get this sooner or later

    Benny
    Last edited by BennyTheMan; 08-22-2017 at 03:36 PM.
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  3. Darth Lord of the Sith ITSpectre's Avatar
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    #2
    In the darkest hour, there is always a way out - Eve ME3
    “The measure of an individual can be difficult to discern by actions alone.” – Thane Krios
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  4. Darth Lord of the Sith ITSpectre's Avatar
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    #3
    In the darkest hour, there is always a way out - Eve ME3
    “The measure of an individual can be difficult to discern by actions alone.” – Thane Krios
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  5. Member
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    #4
    thanks for all the help!

    Now I have something to do this afternoon!
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  6. Junior Member nole07's Avatar
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    #5
    what makes the most sense to me is you have to think about it from your perspective. wherever i am located is always the inside local/global...everything else is outside local/global.

    Me on my pc at home [private ip](inside local)>>>home router interface[public ip] (inside global)>>>>>>>>>everything else is outside local/global
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  7. Senior Member
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    #6
    i have been using boson ex max sim and it has a lot of stuff that has helped me learn about nat
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