Said today:
In a major example of false positives, we already have examples of one
real cost of spam. AOL (as one example of many) has declared ranges of
IP addresses marked 'residential' as invalid for running a particular
application. In this case SMTP, but which app is next? There is a 'guilt
by association' presumption here by the operations community, which when
carried into other applications results in substantially limited value
in the core IP protocol.
About port blocking:
I think its inevitable a class action lawsuit will be tabled that any port
must be opened at the same rate/cost restriction structure (or lack of it),
as any other. The concern IP is at least a little as risk for functionality
is pretty serious stuff.
MPLS might improve this by making only the edges know the applications. But
the general principle you pay for "X" and don't get it because of the
actions of others who's behaivoirs superficially resemble yours is unfair
in a way regarded as often actionable.
regs
Dan