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upc addresses

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  • 30-04-2011 8:05pm
    #1
    wolfric
    Registered Users Posts: 1,190 ✭✭✭


    Anyone happen to know if the ip addresses you get from upc are in a row?

    As in your normally get 3? Are they side by side (eg .20,.21,.22)


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    #2
    Shane O' Malley
    Registered Users Posts: 1,373 ✭✭✭Shane O' Malley


    No system i know issues them in a row.

    Issues them as they become available in the pool as far as i know.


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    #3
    demanufactured
    Closed Accounts Posts: 5,756 ✭✭✭demanufactured


    Umm you only get one IP adress at a time from upc


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    #4
    snappieT
    Registered Users Posts: 3,357 ✭✭✭snappieT


    wolfric wrote: »
    As in your normally get 3?
    I didn't know there was a specific allocation of 3, do you have a source for that? IPs that UPC allocate come from a DHCP pool, rather than being static IPs - so you can't rely on them to not change, even less for them to be in a row.
    demanufactured wrote: »
    Umm you only get one IP adress at a time from upc
    Try plugging multiple computers in via a switch (not a router) - if you're not NATed, you get public facing IPs. I just don't know if that's through accident or not!


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    #5
    demanufactured
    Closed Accounts Posts: 5,756 ✭✭✭demanufactured


    I have tried it with a switch .....I could only get one pc to get an IP address


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    #6
    Webmonkey
    Registered Users Posts: 9,579 ✭✭✭Webmonkey


    snappieT wrote: »
    Try plugging multiple computers in via a switch (not a router) - if you're not NATed, you get public facing IPs. I just don't know if that's through accident or not!

    That's a bit odd. Can you really confirm this? - I'm not with UPC myself but with the shortage of IPv4 addresses, I'd imagine they'd want you to be NAT'd to private addresses on your side. Plus it's the WAN interface on your modem that will get the public IP?


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    #7
    Shane O' Malley
    Registered Users Posts: 1,373 ✭✭✭Shane O' Malley


    Webmonkey wrote: »
    That's a bit odd. Can you really confirm this? - I'm not with UPC myself but with the shortage of IPv4 addresses, I'd imagine they'd want you to be NAT'd to private addresses on your side. Plus it's the WAN interface on your modem that will get the public IP?

    As far as i am aware this is called PPPOE (http://en.wikipedia.org/wiki/Point-to-Point_Protocol_over_Ethernet) and allows devices other than the router to get public IP's.

    Not unusual. Most internet providers allow it.

    Shane


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    #8
    Webmonkey
    Registered Users Posts: 9,579 ✭✭✭Webmonkey


    I must get back into networking again, I'm forgetting everything! :(

    Cheers.


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