Re: mboned: UDP port conflict mtrace/traceroute

On Mon, Jul 29, 2019 at 1:36 PM Joe Touch <[email protected]> wrote:
>
> On 2019-07-29 10:09, Warren Kumari wrote:
>
> ...
>
> Just FYI, I sent email to IANA letting them know that ports 33435 -
> 33534 should probably be listed it as "Known Unauthorized Use".
> From some archaeology, 33434 is apparently 2^15 + 666, and the
> "standard" traceroutes use up to 100 ports.
> I based this on the Van Jacobson ([email protected]) - 1988 which he
> "stole" (credited) from Steve Deering -- easiest location of code is:
> https://github.com/freebsd/freebsd/blob/master/contrib/traceroute/traceroute.c
>
> I don't much like referring to it as "Known Unauthorized Use" but
> that's technically what it is -- the important bit to me seems to be
> that we make in some way so they don't get handed out, exactly what
> they should be called is a less pressing problem.
>
>
> Although that's helpful to those seeing traffic on those ports, it does not prevent IANA from assigning those values when requested.
>
> The only way to do that would be to make them ASSIGNED. That happens by the process indicated in RFCs 6335 and 7605 and notably is not driven by this sort of "squatting".
>
> NOTE: at the time that code was originally developed (1988), that range was OK for such uses without registration, but times changed in 1992.
>
> That code ought to be fixed.

Yes, that is true -- that code ought to be fixed; however, it doesn't
change the fact that mtrace cannot realistically be deployed using
this port -- enabling it on a router breaks traceroutes through that
router, leading to asterisks (I'd thought that we'd agreed on that,
but while looking back through my mail on this topic, it's possible
I'd misunderstood, and you don't actually agree that this port isn't
fit *for this particular purpose*).

Just wanting to make sure we are all on the same page, and they MBONED
will be publishing a -bis, deprecating this RFC and publishing a new
one with a different port...

W
>
> Joe



-- 
I don't think the execution is relevant when it was obviously a bad
idea in the first place.
This is like putting rabid weasels in your pants, and later expressing
regret at having chosen those particular rabid weasels and that pair
of pants.
   ---maf

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