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I'm looking to build a firewall that will perform "man-in-the-middle" inspections on SSH traffic. It will decrypt, inspect and re-encrypt traffic. There are quite a few free solutions for SSL deep inspection that do this, but none for SSH.

I am particularly interested in the ability to do fine grained filtering of applications and commands (like preventing a user from launching a remote web browser through X11 over SSH).

Open source dpi tools include nDPI, Libprotoident, and Netifyd but I don't think they have this feature.

  • So, you have the SSH credentials/etc of everyone going through, if I understand correctly? – Nicolas Raoul May 14 '18 at 7:51
  • yes, but I've been doing some reading and it seems like these man-in-the-middle solutions are really bad practice – user27636 May 14 '18 at 15:42

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