Variable I/P address

Discussion in 'Home Networking' started by Paul Aitman, Dec 1, 2005.

  1. Paul Aitman

    Paul Aitman Guest

    Hi All,

    Most people seem to want and crave a static I/P address, however, for
    various reasons (none of them iffy honest) I need a variable one which
    will change with some degree of frequency.

    I am not sure whether this can be achieved either by say rebooting an
    ADSL modem daily, or maybe there are still some ISPs out there who do
    dynamic I/P allocation. I know AOL used to be the ubiquitous example of
    an ISP that used dynamic I/P allocation but I really don't want to use

    Anyone know much about this topic as I have asked several professionals
    and none of them seem to know how I can achieve the desired effect. My
    Internet connection will most likely be through ADSL broadband, the ISP
    yet to be decided.

    Paul Aitman, Dec 1, 2005
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  2. Paul Aitman

    Chris Watts Guest

    Many (most?) ISPs provide dynamic IP addresses unless you pay more. But
    dynamic does not mean that it will cahnge regularly. Few, if any,
    disconnect and reconnect you just to change the IP address. Disconnecting,
    and reconnecting, from your end will mean that you are requesting an IP
    address from your ISP. Some while ago when I did this frequenlty (during a
    testing phase) I seemed to get the same one reallocated; currently doing
    that seems to mean that I get a new address. So disconnect/reconnect does
    not guarantee a new different IP address.

    Chris Watts, Dec 1, 2005
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  3. Paul Aitman

    Jeff Gaines Guest

    Have a look at Demon ( - they offer a dynamic IP address
    on one of their home services.
    Jeff Gaines, Dec 1, 2005
  4. Paul Aitman

    Dave J. Guest

    The way it seems to work (with dynamic allocation) is that if you
    reconnect before your old IP has been given out to someone else you
    reacquire it. If you wait a minute or five then it is usually a different
    one. Sometimes even seems to work that way on pstn dialup connections
    though it could be my imagination as I'd have thought it would require
    extra hardware to associate a CLID with an IP.

    Dave J
    Dave J., Dec 1, 2005
  5. Paul Aitman

    Linker3000 Guest

    Oh, go on - why!?
    Linker3000, Dec 1, 2005
  6. Paul Aitman

    Paul Aitman Guest

    No really, it is just for a little extra privacy. I know more sites
    would probably track users with cookies than I/P addresses, but I would
    prefer that sites could not deduce it was me just because I was stuck
    with the same I/P address ad inifinitum.

    I am also not really interested in using any of those anonymiser
    packages like secure-tunnel etc etc...

    Thanks for all the feedback so far though!
    Paul Aitman, Dec 1, 2005
  7. Paul Aitman

    Robert Bass Guest

    Pretty much all ADSL services are dynamic, and a static IP address is
    usually considered an extra and something only some more expensive ISPs
    offer. So you have quite a few ISPs to choose from. Just a quick thought,
    if you use a router, set the time out to a reasonable level, 30 minutes or
    whatever and I assume when it goes back in each time you are likely to have
    a new IP address. By the way, I agree with you entirely about your reason,
    as a friend of mine has a fixed IP address and is being targetted regularly
    by the same hackers, so I prefer (an have) a dynamic IP too, for the very
    same reason you want one.
    Robert Bass, Dec 1, 2005
  8. that way you get the hackers that were targetting the previous user.
    Wow, great advance that is.

    Phil Thompson, Dec 1, 2005
  9. Paul Aitman

    Alan LeHun Guest

    IP no's on ADSL are provided by the BT radius so all providers will be
    the same as far as IP no's are concerned. For dynamic IP's, BT uses a
    "sticky" system which means that an IP no is only released if it is
    needed for another line. This only really occurs for those providers who
    have more customers than IP no's.

    You can trick the system into giving you a new IP by trying to log on
    with a false password. This will result in the BT radius from
    disassociating the line with the IP information. When you log back in
    with your correct password, you will be very unlucky indeed if you find
    yourself with the same IP.

    Alan LeHun, Dec 1, 2005
  10. Paul Aitman

    Dave J. Guest

    Don't you think there's a slightly greater (just above zero) chance of
    someone specifically targetting an IP on a static range on the grounds
    that it is always the same machine?

    Most of the script kiddie stuff revolves around scanning wide ranges of
    IPs looking for specific vulnerabilities and that, when combined with
    worms, makes up the vast majority of the attempts I've looked at.

    I've always thought that the only way you'd get a 'real' hacker poking at
    your system is if you give them a reason, and if you get one of those then
    a dynamic IP won't make a lot of difference as if there's *anything* you
    do that's distinctive they'll have a way to latch onto your current IP,
    and by the time you've logged off their software is installed.

    Dave J
    Dave J., Dec 2, 2005
  11. Paul Aitman

    Linker3000 Guest

    Having a variable IP address does not guarantee anonymity - your PC and
    router have a fixed MAC (Media Access Control) address that never
    changes and with the right software it's possible to identify the origin
    of any data packet through MAC addresses.
    Linker3000, Dec 5, 2005
  12. Paul Aitman

    Fred Guest

    Your MAC address is generally a layer not visible to the "www"!
    Fred, Dec 5, 2005
  13. Paul Aitman

    Fred Guest

    Why not get a block of IP addresses and then change the one you use
    periodically and at your choosing?
    Fred, Dec 5, 2005
  14. Paul Aitman

    Linker3000 Guest

    I know but it is traceable with the right kit.
    Linker3000, Dec 5, 2005
  15. Paul Aitman

    Dave J. Guest

    And changeable with the right kit.

    Dave J.
    Dave J., Dec 6, 2005
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