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Showing the netfilter with the OSI layer on the left, after all these years is absolutely clutch and as an educator, I'm thankful the author made such a thing.

Showing the netfilter with the OSI layer on the left, after all these years is absolutely clutch and as an educator, I'm thankful the author made such a thing. It's beautiful. I feel like from an abstraction standpoint, a lot of these concepts get lost when you transition to Windows and in either direction, these pre/post chains never quite made sense to me on the surface. Though, I'm positive it's because I'm not a developer or sysadmin in linux daily. I imagine there's some fascinating stuff you can do.

chatmasta 3y ago
This diagram [0] from Wikipedia has always been my favorite way of understanding the flow of a packet through the kernel. [0] https://upload.wikimedia.org/wikipedia/commons/3/37/Netfilter-packet-flow.svg https://upload.wikimedia.org/wikipedia/commons/3/37/Netfilte...
furkansahin 3y ago
Hey! Author here :) Thanks for the kind words but I have to direct the good words to another blog post that a friend named Andrej Stender wrote. I used the image with his permission. Check out his blog post, it's where I learned about Flowtables from https://thermalcircle.de/doku.php?id=blog:linux:flowtables_1_a_netfilter_nftables_fastpath https://thermalcircle.de/doku.php?id=blog:linux:flowtables_1....