Programmer Humor

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Firewall (lemmy.world)

submitted 6 months ago by [email protected] to c/[email protected]

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[–] [email protected] 3 points 6 months ago (1 children)

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.

[–] [email protected] 1 points 6 months ago* (last edited 6 months ago)

OPNsense has an anti-lock-out rule at the top for a reason 😁