IPv6 PI block is announced - update your filters 2620:0000::/23

Randy Bush randy at psg.com
Fri Sep 15 22:34:53 UTC 2006

> Call me naive, but could somebody enlighten me as to what tangible 
> benefit filtering out bogon space actually achieves? It strikes me that 
> it causes more headaches than it solves.

the theory is that it means you have no route to send responses back to 
an attacker who uses tcp, i.e. a spammer.

the practice is that spammers use holes or super-blocks of allocated, 
i.e. not bogon, space.  they are not stupid.

so your point is well taken.


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