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my isp offers 2 ip addresses

Discussion in 'Networking (Hardware & Software)' started by taki, 2003/02/17.

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  1. 2003/02/17
    taki

    taki Inactive Thread Starter

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    my isp offers 2 ip addresses, but how do i assign each pc with it's own?

    right now i have 2 computers sharing a connection using a linksys router. the router assigns ip addresses to both of them. and i guess it "takes in" an ip from my isp.

    however, my isp offers me 2 ip addresses and i was wondering how i'm going to use them, so that each computer has it's own ip that's not from the router. or is this not possible?
     
    taki,
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  2. 2003/02/17
    mflynn

    mflynn Inactive

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    You would need them if not using a router. But with a router it don't matter if you have a hundred.

    Forget it!

    Now you do have access from the 2nd PC don't you?

    Mike
     
    Last edited: 2003/02/17

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  4. 2003/02/17
    taki

    taki Inactive Thread Starter

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    thanks.
    yeah i do have access with the second pc.
    just wondering, how would it work if i didn't have a router?
     
    taki,
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  5. 2003/02/18
    Newt

    Newt Inactive

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    If you plug both PCs and the cable modem into the regular switch ports on the router, you should be able to use both IP addresses just fine. But you lose the protection you get from NAT on the router. And I can't see any potential gain for you.
     
    Newt,
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  6. 2003/02/24
    teoren

    teoren Inactive

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    What about incoming connections, Newt?
     
  7. 2003/02/26
    Newt

    Newt Inactive

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    If initiated from the internet and inbound, NAT can cause some problems.

    If the packets are always the same type (FTP, ICQ, whatever) and always for the same PC on your LAN, you can set up "port forwarding" that basically tells your router that any packet destined for port 20/21 (for FTP) is to go to a particular PC at your place.

    Similar trick for running a game server on your LAN - just probably more ports involved.

    But you do have a point. If you need to have packets originated on the internet/WAN that may be intended for more than one PC at your place, you would need to maintain seperate assigned IP addresses and a router with NAT wouldn't work for you.
     
    Newt,
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  8. 2003/02/27
    teoren

    teoren Inactive

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    Yes. But still for common use one IP address is enough. ;)
     
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