Here are some notes on a talk on #jails on #FreeBSD I've given a week ago at the @bsdstammtisch in Vienna.
https://www.skyforge.at/posts/an-introduction-to-jails-and-jail-networking/
The post tries to cover the very basics of jails, jail networking and thin jails using only base system tools, so there's no iocage, ezjail or other magic stuff. I hope to get to more elaborate topics at some point in the future.
Feedback is - of course - always welcome!