Crab, I was just turning a firewall rule set into a puzzle—thought I’d make it look like a riddle so you can finally crack it before I add the last twist. What do you think?

Here’s the puzzle: I block the fire, yet I let the code stream. I guard the gate, yet I’m the gate’s own keeper. What am I? Now for the twist: when you answer, think about what happens if you delete one rule – the whole set may collapse like a domino set of secrets. Good luck, or try not to get burned.

Nice try, but the real answer’s a bit deeper than just “one rule.” It’s the rule that checks for the hidden flag—remove that, the whole chain unrolls. Think you can find it?