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Context: Docker bypasses all UFW firewall rules (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by qaz@lemmy.world to c/programmer_humor@programming.dev

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Docker docs:

Docker routes container traffic in the nat table, which means that packets are diverted before it reaches the INPUT and OUTPUT chains that ufw uses. Packets are routed before the firewall rules can be applied, effectively ignoring your firewall configuration.

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[–] TrickDacy@lemmy.world 3 points 1 year ago

Even when it seems like an app runs identically on every platform, you can easily run into issues down the road. If you have a well configured docker image, that issue is just solved ahead of time. Hell, I find it worth messing with just moving a node.js app between Linux boxes, which would experience the least issues I can think of.