local net

can you recommend a tutorial an how to switch on an ad-hoc Wifi say on FreeBSD 13.2? (on a Thinkpad x250) No routing to the internet required, access to local services (http, ssh) is enough.

So I've been trying to use i2p more often (Im using the .jar from the official website since i2p in ports is outdated), but the most annoying thing is using it on a main desktop computer so whenever you reboot it has to restart and build tunnels all over again. I see a lot of people set it up on...