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[deepspace] Re: A possible TIPTOP deployment question: traffic crossing heterogeneous network boundaries

Michael Richardson <mcr+ietf@sandelman.ca> Sun, 28 June 2026 17:46 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: RJ A <rja.lists@gmail.com>, deepspace@ietf.org
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Subject: [deepspace] Re: A possible TIPTOP deployment question: traffic crossing heterogeneous network boundaries
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RJ A <rja.lists@gmail.com> wrote:
    > In the current threat environment, it is clear that it would be unwise
    > to change behavior in reaction to an unauthenticated control message,
    > such as an ICMP message.  Authorization is also an issue here, albeit
    > one that IETF has never really sorted out.

Agreed strongly.

It's a kind of authorization that many mechanisms would benefit from, but
seems impossible to ever get to.
{Had it been there from the beginning, I suspect that IP would have not succeeded...}

(This is a reason why prefix per celestial body is useful; if destination is
"non-local", then go for better defaults. )


--
Michael Richardson <mcr+IETF@sandelman.ca>   . o O ( IPv6 IøT consulting )
           Sandelman Software Works Inc, Ottawa and Worldwide

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