nanog mailing list archives

RE: Force10 Gear - Opinions


From: "James Jun" <james () towardex com>
Date: Thu, 4 Sep 2008 10:24:53 -0400

uRPF strict as a configuration default, on customers without possible
asymmetry (multihoming, one-way tunneling, etc) is not a bad default.
But when the customers increase in complexity, the time might come to
relax things some.  It's certainly not a be-all-end-all.  And it's
been demonstrated time after time here that anti-spoof/bogon filtering
isn't even a factor in most large-scale attacks on the public Internet
these days.  Think massively sized, well connected, botnets.  See also
CP attacks (which, again, the F10 can't even help you with).

Indeed... In today's internet, protecting your own box (cp-policer/control
plane filtering) is far more important IMO than implementing BCP38 when much
of attack traffic comes from legitimate IP sources anyway (see botnets). 

james




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