@Hubert - we have agreed Crypto gets the questions about algorithms, maths, how crypto works and we get the implementation, what crypto you should use in your environment etc.

From the faq: IT Security - Stack Exchange is for Information Security professionals to discuss protecting assets from threats and vulnerabilities.

a home network is unlikely to be on topic for Security SE

IT security has a very different scope than System administration, in fact it is a lot wider than IT Security - we also encompass a lot of other security aspects a security professional will be likely to deal with, including social engineering, forensics, physical security, CCTV etc.

And even on IT Security - if there isn't a white hat angle we tend to close.

@voretaq7 - definitely try it by tags. I use 30-odd SE sites, so it wouldn't be useful to visit them all and trawl through, so I have a tag set which I look at a couple of times a day and follow the links to whichever site has the question. I also do a fair bit of 'ignored tags' on some sites just to help with this. It just cuts down the 'noise' to a better level.