What is everyone doing? SELinux? AppArmor? Something else?
I currently leave my nextcloud exposed to the Internet. It runs in a VM behind an nginx reverse proxy on the VM itself, and then my OPNSense router runs nginx with WAF rules. I enforce 2fa and don’t allow sign-ups.
My goal is protecting against ransomware and zerodays (as much as possible). I don’t do random clicking on links in emails or anything like that, but I’m not sure how people get hit with ransomware. I keep nextcloud updated (subscribed to RSS update feed) frequently and the VM updates everyday and reboots when necessary. I’m running the latest php-fpm and that just comes from repos so it gets updated too. HTTPS on the lan with certificates maintained by my router, and LE certs for the Internet side.
Beside hiding this thing behind a VPN (which I’m not prepared to do currently), is there anything else I’m overlooking?
I’ve had my Nextcloud exposed for a long while now without any incidents (that I know of). I know automatic updates are not generally recommended but if you want a lighter load, you could use LSIO’s docker container (I use the standard db in the sample config). I run mine that way with watchtower and can’t recall ever in recent times when an update broke Nextcloud. Other than that, nextcloud has a brute-force plugin and you could consider overall hardening the entry points of the machine hosting Nextcloud (e.g ssh).