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Please help with my Question

  • 26-04-2011 1:08pm
    #1
    .223 Paul
    Registered Users, Registered Users 2 Posts: 26 ✭


    Hi Guys

    Its been annoying me now for a while but when you use the command prompt to see what your ip address is, it gives you a address all right, but when you go online and type in "what is my ip address" it gives you a completely different ip address??
    Can anyone tell me whats the difference with them or why is this or anything please!

    Thanks
    Hope ye can help.


Comments

  • #2
    Spear
    Moderators, Computer Games Moderators, Technology & Internet Moderators, Help & Feedback Category Moderators Posts: 25,757 CMod ✭✭✭✭Spear


    .223 Paul wrote: »
    Hi Guys

    Its been annoying me now for a while but when you use the command prompt to see what your ip address is, it gives you a address all right, but when you go online and type in "what is my ip address" it gives you a completely different ip address??
    Can anyone tell me whats the difference with them or why is this or anything please!

    Thanks
    Hope ye can help.

    It's called NAT, network address translation.


  • #3
    bonzodog2
    Registered Users, Registered Users 2 Posts: 6,285 ✭✭✭bonzodog2


    The IP listed at the command prompt is usually a local network address, often 192.168.x.y, the one reported by a website is a public routable one, and represents the outward-facing net interface of the device your pc connects to first, assuming you have a DSL router/modem or cable modem/router. On dial-up you used to get a public IP from a pool.


  • #4
    .223 Paul
    Registered Users, Registered Users 2 Posts: 26 ✭.223 Paul


    Tanks spear

    So basically are you saying that the ip adress given in command prompt which is 147.152.whatevr is changed into 82.41.whatevr??

    Cheers


  • #5
    .223 Paul
    Registered Users, Registered Users 2 Posts: 26 ✭.223 Paul


    tanks bonzo

    So if i wanted to use remote desktop connection to connect to my friends computer i would use the ip address given online??

    Thanks


  • #6
    Spear
    Moderators, Computer Games Moderators, Technology & Internet Moderators, Help & Feedback Category Moderators Posts: 25,757 CMod ✭✭✭✭Spear


    .223 Paul wrote: »
    Tanks spear

    So basically are you saying that the ip adress given in command prompt which is 147.152.whatevr is changed into 82.41.whatevr??

    Cheers

    You mean you have something with 147.152.x.x internally, but 82.41.x.x as the public interface IP? Are those just random examples, or real world ones? It seems a bit odd as the first one in BT, but the second one is UPC.

    In the case of RDP, yes external users connect to the public IP, and you'll need to forward port 3389 to the internal address.


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