The topic of the question is less a determinant than the audience who would benefit from the question. If you're not sure, you can always ask in the [Comms Room][1].
.htaccess questions generally should go to webmasters.SE
"I've never done XYZ server, where do I start" is Off-Topic
"Errors in server software" On-Topic
See 2nd for I've never done configuration questions. They make man pages for a reason.
PS is almost always On-Topic
.NET Apps are either SO or webmasters.SE
Questions related to home setups, or personal software/hardware belong on SU or unix.SE. General rule: home servers aren't welcome here (though if you can't tell the difference between a home setup and a profession one, we wouldn't care). [1]: http://chat.stackexchange.com/rooms/127/the-comms-room