On 10/2/2015 1:10 AM, Mark Andrews wrote:
or working out how many addresses a site needs when handing out address blocks
At first, I'm with you on this.. but then when you got to the part I quoted above...
it then seems like dividing lines can get really blurred here and this statement might betray your premise. A site needing more than 1 address... subtly implies different usage case scenarios... for different parts or different addresses on that block... which could slip back into... "you blocked my whole /48... but the spam was only coming from this tiny corner of the block over here (whether that be a one IP, a /64, or a /56)... and now other parts of the block that were sending out legit mail, are suffering".
Likewise, sub-allocations can come into play, where a hoster is delegated a /48, but then subdivides it for various customers.
-- Rob McEwen +1 478-475-9032
