A lot of this problematic terminology is metaphorical in some way. If you strive to use descriptive terms, rather than metaphorical terms, then you should end up with language that is more straightforward and clear. For example, block list / allow list. Primary / replica. Source / sink. Upstream / downstream. Active interception / passive snooping. Tony. -- f.anthony.n.finch <dot@xxxxxxxx> http://dotat.at/ Hebrides, Bailey: Cyclonic, becoming north or northwest, 5 to 7, occasionally gale 8 at first in Hebrides. Rough or very rough, occasionally moderate in Hebrides. Squally showers. Good, occasionally moderate.