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Firewall
(lemmy.world)
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this post was submitted on 16 Feb 2024
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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