716
Firewall
(lemmy.world)
Post funny things about programming here! (Or just rant about your favourite programming language.)
It happened to me when I was configuring IP geoblocking: Only whitelist IP ranges are allowed. That was fetched from a trusted URL. If the DNS provider just happened to not be on that list, the whitelist would become empty, blocking all IPs. Literally 100% proof firewall; not even a ping gets a pass.
OPNsense has an anti-lock-out rule at the top for a reason ๐