route ingress

Love to hear something about this at Nanog. Even if just
a 5 minute thing, saying, hey operators, your going to need this,
read it, comment on it, beat your favorite router vendor(s) to impentlement

Just a couple of weeks ago, I was receiving multiple spams from a site
that was being attacked with forged tcp connections to their mail server.

This is the tcp sequence-number-guessing style of attack, and it was
working quite well for the attackers.

Is this new?