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    This discussion has been archived. No new comments can be posted.
    ICANN, VeriSign and the Future of .Net | Log in/Create an Account | Top | 19 comments | Search Discussion
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    A .NET Myth - or IPv4 101 and ICMP+
    by Anonymous on Friday October 01 2004, @11:33AM (#14256)
    Karl Auerbach recently defined the Internet in
    terms of packets with source and destination
    addresses.

    With the demise of ICMP in the core network,
    it is a myth that packets *must* have a source
    address field which contains a 32-bit quantity
    which can be used for a direct reply.

    With the increasing use of ICMP+ on edge routers
    one sees that the source address field is useful
    for carrying informational values. As an example,
    the ICMP+ message "Suspected Spammer" can be
    sent to a destination address and the source
    address can contain the address prefix of the
    suspected site. Any edge device can launch the
    packet. The destination can take it as an
    advisory, or act on it.

    With other ICMP+ messages such as:
    "Suspected Attorney"
    "Suspected Government Spook"
    "Suspected ISOC Member"

    the edge devices can inform each other what
    they see. In some cases, people can program
    their edge device to stop routing to the prefix
    specified in the source address. The ICMP+
    message enters the stack and never reaches the
    user application programs. The dynamic prefix
    table is contained in the O/S kernel which now
    benefits from many more meg of RAM than available
    in the 1980s when mainframes were used to send
    TCP|UDP.IP Those days are over. ICMP+ is what
    consumers want.
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