I use ZeroTier on my Turris Omnia so I can access my home services remotely. It works like a champ even behind CGNAT, which unfortunately is my case.
However, recently I lost connection from outside, and upon investigation I noticed that the
zerotier service was not running on the router. A little bit of digging and I found that
/etc/config/zerotier had been reset to the package defaults.
There was an upgrade on Monday (20th of January), and the file is correct in the pre-update snapshot but defaulted on the post-update, so clearly the update overwrote it.
Is there anything I can / have to do to avoid this happening again in the future?