[SURBL-Discuss] RFC: consensus list?

Frank Ellermann nobody at xyzzy.claranet.de
Sat Nov 13 18:23:34 CET 2004

Jeff Chan wrote:

> LOL!  I didn't think of that!

Just an idea how to use bit 0 of multi in a way indicating
"interesting" combinations.  Ryan identified "any 3 out of
6 multi bits" as relevant.

That's probably too KISS for you, and if you'd add the not
yet used 7th multi bit it would result in 7 over 3 (any 3
out of 7) combinations, 99 result codes if I got it right.
(35 + 35 + 21 + 7 + 1 = 99, is that correct ?)

Apparently SA already supports Ryan's idea, and then you
don't need it.  But if you have more complex rules to get
an "optimal" proper subset of all multi result codes, then
you could (ab)use bit 0 to mark it.

Or in other words, any odd N in 127.0.0.N would be optimal.
And would be still protected (= never returned).

> without explicitly creating new, combined lists.

Yes, that's unnecessary.  Unless you have more than one
definition of "optimal".  Bit 0 can only handle one "rule",
i.e. any combination of AND / OR / NOT multi bits you like.

                     Bye, Frank

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