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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Joachim Nilsson‏ @troglobit Jun 21

      Joachim Nilsson Retweeted Rich Felker

      And behold, the IEEE gods gave us 802.1AE. #MACsechttps://twitter.com/RichFelker/status/1009870219333062658 …

      Joachim Nilsson added,

      Rich Felker @RichFelker
      The network layer is not access control. The network layer is not access control. The network layer is not access control. The network layer is not access control. The network layer is not access control. The network layer is not access control. https://twitter.com/justincormack/status/1009579934828949504 …
      1 reply 0 retweets 0 likes
    2. Rich Felker‏ @RichFelker Jun 21
      Replying to @troglobit

      Eeew.

      1 reply 0 retweets 0 likes
    3. Joachim Nilsson‏ @troglobit Jun 21
      Replying to @RichFelker

      It's actually pretty sweet. Linux has support for it in iproute2 + kernel.

      1 reply 0 retweets 0 likes
    4. Rich Felker‏ @RichFelker Jun 21
      Replying to @troglobit

      It's still a tool for letting people do something fundamentally wrong and insecure with a false sense that it's secure.

      1 reply 0 retweets 0 likes
    5. Joachim Nilsson‏ @troglobit Jun 21
      Replying to @RichFelker

      Um, it's encrypted, like IPsec? Maybe you mean 802.1X?

      1 reply 0 retweets 0 likes
      Rich Felker‏ @RichFelker Jun 21
      Replying to @troglobit

      Using IPsec for access control is another iteration of the same insecure design. You're granting access to any process that can make a connection from the magically-trusted host.

      1:02 PM - 21 Jun 2018
      2 replies 0 retweets 0 likes
        1. New conversation
        2. Joachim Nilsson‏ @troglobit Jun 21
          Replying to @RichFelker

          You're like my hero, so I will not pick a fight with you, but we're clearly talking about different things. I apologize for commenting in the first place and will stay out of your way. Take care

          1 reply 0 retweets 1 like
        3. Rich Felker‏ @RichFelker Jun 21
          Replying to @troglobit

          OK, maybe so. FWIW I have no objection to using IPsec or similar tools as a privacy layer, but I do think it's really dangerous to think they suddenly make it safe to treat location-on-network as an access control method.

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. New conversation
        2. Rich Felker‏ @RichFelker Jun 21
          Replying to @RichFelker @troglobit

          In doing so, you're throwing out all privilege boundaries within that host or between other hosts it might forward/nat traffic for, and treating them all as one big trusted blob.

          1 reply 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker Jun 21
          Replying to @RichFelker @troglobit

          Some of these boundaries can be recreated with fancy iptables rules controlling which processes can make connections on which ports, but that's a sloppy, fragile replacement for process memory space isolation, filesystem permissions, etc.

          0 replies 0 retweets 0 likes
        4. End of conversation

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