Re: Proposal to apply mask to IP address set on rule

[Mouse <mouse%Rodents-Montreal.ORG@localhost>]

> RFC4652 clearly expects/requires CIDR prefix lengths be powers of
> two.

I think you probably don't mean that.  If you did, there would be only
six possible IPv4 prefix lengths: /1, /2, /4, /8, /16, and /32.  It's
the netblock size, not the prefix length, that must be a power of two.
CIDR cannot represent a non-power-of-two-sized block without expressing
it as the union of multiple blocks.  (To be fair, neither can non-CIDR
noncontiguous netmasks; inherent in the mask paradigm is that each
block be a power of two in size.)

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