Private Address Spaces

Discussion in 'Linux Networking' started by Andrew, Jul 9, 2003.

  1. Andrew

    nicklebon Guest

    BINGO you pay them for a connection to the internet. EVERY
    firewall and defense technique has pitfalls. If the the ISP provides
    defense somethings will fail on the customer end. That is why
    it is YOUR responsiblity to provide the protection YOU need for
    YOUR applications to work and no one elses.

    BTW you have contradicted yourself. you said earlier in this
    thread that your ISP used privated ipaddresses now you the
    ISP is in fact leasing a public block.

    You sir are a troll and as such are no longer worth my time.

    Good day
    nicklebon, Nov 24, 2003
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  2. Andrew

    Anonymous Guest

    No, your IP address is NOT just private between you and your ISP, and
    you're devolving further and further into complete gibberish.

    And if you don't like your ISP being a geographic monopoly, move. or
    open your own.


    P.S. If you don't like the security holes in windows, don't use it.


    Mornings: Evolution in action. Only the grumpy will survive.

    Please note - Due to the intense volume of spam, we have
    installed site-wide spam filters at If
    email from you bounces, try non-HTML, non-encoded,
    Anonymous, Nov 24, 2003
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  3. Andrew

    Jim Fischer Guest


    A NIC's data link address (a.k.a., MAC address, data link identifier) is
    not necessarily unique among all NICs. A company that manufactuers
    millions of NICs - e.g., 3Com, Intel, Netgear, etc. - will eventually
    produce multiple NICs with the same MAC address. This is generally not a
    problem, however, because it is statistically unlikely that two NICs
    with the same MAC address will ever be attached to a particular LAN at
    the same time. The general idea here is that a NIC's MAC address must be
    unique only on the LAN that the NIC is currently communicating on.
    Jim Fischer, Nov 24, 2003
  4. Andrew

    James Knott Guest

    Is your street address private between you and the post office?


    Fundamentalism is fundamentally wrong.

    To reply to this message, replace everything to the left of "@" with
    James Knott, Nov 24, 2003
  5. No, they won't. They get a second (or third, or ...) manufacturer id.

    Craig A. Finseth, Nov 24, 2003
  6. Sir:
    NO!!! Your IP is public and tied to you the second you use it. Attempt
    to disguise it and you'll be liable to legal action in the US, when the
    new SPAM law passes this week, not to mention that you'll be in breach
    of your service agreement. Read it.
    Who said anything about moving or changing ISPs? Not I. That was
    someone else. If you have a bitch with them, place your comments after
    their quote and tag it to their post.
    William L. Hartzell, Nov 25, 2003
  7. Andrew

    Bob Eager Guest

    However, many NICs can be told by software to use a different MAC
    address networking protocol relies (or did) on that...!
    Bob Eager, Nov 25, 2003
  8. Program ended abnormally on 24/11/2003 10:39, Due to a catastrophic
    mchiper error:

    What is commonly referred to as "private address space" has nothing to do with
    pirvacy. It is simply three ranges of IP addresses (10.x.x.x,
    172.16.x.x-172.31.x.x and 192.168.x.x) that companies are recommended to use for
    their internal lans to limit the wasteful usage of ip addresses. Those IP
    address ranges are not routable on the internet, so if you were to use one of
    them, you would not be able to contact any web site, e-mails erver, etc...
    The ip address that you get when you connect to your ISP is indeed used so that
    you may connect to other sites. Your ISP might use private addresses, but most
    If your ISP used private addresses, unless they used some sort of translation
    mechanism (called NAT) at their border, the other end would not know where to
    send packets back to you. The great majority of ISPs do not use NAT because it
    can cause all kinds of problems with some applications that need to allow the
    other end to initiate the connection (instant messengers, file-sharing
    softwares, etc...) or applications that simply do not work with NAT (vpn
    tunnels, etc...)
    Yes. As others have pointed out, you should lock your doors at night, and don't
    leave your car's windows open in the shopping center's parking lot.
    That is a bad analogy. You send an order to a company for a parcel. You need
    to tell that company where you live, so that they can send the parcel back to
    you. The postman needs to be able to find your house to deliver the parcel to
    you. You should also put a return address on regular mail you put in your
    mailbox so that in you did not put enough stamps on it, or your intended
    recipient moved, the postman can return it to you.

    It is the same for Internet traffic.
    Francois Labreque, Nov 25, 2003
  9. Andrew

    Don Kelloway Guest

    FWIW It was about four years I had two 3COM 3c509 NICs each with the
    same physical address.

    Best regards,
    Don Kelloway
    Commodon Communications

    Visit to learn about the "Threats to Your
    Security on the Internet".
    Don Kelloway, Nov 27, 2003
  10. Andrew

    CCIE8122 Guest

    Or, That I can force my ISP to change mine by changing my NIC card.
    Not to split hairs, but I have seen "NIC" as an acronym for both
    "network interface card" AND "network interface controller," so under
    the latter, "NIC card" is an acceptable use, and ripping on someone for
    saying it is sort of pointless.

    CCIE8122, Nov 27, 2003
  11. Andrew

    Bob Eager Guest

    I agree...and would not have bothered in isolation....but he was
    annoying me anyway!
    Bob Eager, Nov 27, 2003
  12. Andrew

    CCIE8122 Guest


    Cant disagree there.

    CCIE8122, Nov 27, 2003
  13. m> Juries are just people like me..

    Really ? Oh dear.
    Jonathan de Boyne Pollard, Dec 3, 2003
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