[sf-lug] firewall/gateway clarification

[Rick Moen]

Quoting Alex Kleider (a_kleider at yahoo.com):

> What do you mean when you describe IP/port filter rule sets as being
> "orthogonal?"

Independent of.  Existing or not existing, functioning or not
functioning, without regard to.

http://en.wikipedia.org/wiki/Orthogonality
(See the figurative or, as they say, "derived" sense in the paragraph
about "Statistics, econometrics, and economics".

In the original mathematical context, it means "at right angles to".