BCP38 making it work, solving problems
Edward B. Dreger
eddy+public+spam at noc.everquick.net
Mon Oct 11 13:49:23 UTC 2004
SD> Date: Sun, 10 Oct 2004 21:35:33 -0400 (EDT)
SD> From: Sean Donelan
SD> People think BCP38 means the packets could only originate
SD> from you.
Were BCP38 universal, this would be true. If one receives a
packet, it's either from the supposed source or a network that
allows spoofing. If no networks allow spoofing, it came from the
SD> [P]eople don't complain to the source of spoofed packet.
SD> People complain to IANA about attacks coming from Net-10.
They complain to the perceived source. Many Internet users are
shocked at how trivial it is to forge email/packet sources; I
guess they're used to services like caller ID where the end user
isn't [traditionally] given the power to spoof.
Then there's postal mail. At least sending spoofed packets is
more costly than IP, and end-user packets frequently are tagged
with an ingress label.
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