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httptap: View HTTP/HTTPS requests made by any Linux program (github.com)

submitted 1 day ago by mox@lemmy.sdf.org to c/linux@lemmy.world

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I haven't used this yet, but the design described in the readme makes it look very convenient compared to the usual array of tools required.

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[–] sbv@sh.itjust.works 5 points 1 day ago

When you run httptap -- , httptap runs in an isolated network namespace, injecting a certificate authority created on-the-fly in order to decrypt HTTPS traffic. Here is the process in detail:

In linux, there is a kernel API for creating and configuring network interfaces. Conventionally, a network interface would be a physical ethernet or WiFi controller in your computer, but it is possible to create a special kind of network interface called a TUN device. A TUN device shows up to the system in the way that any network interface shows up, but any traffic written to it will be delivered to a file descriptor held by the process that created it. Httptap creates a TUN device and runs the subprocess in an environment in which all network traffic is routed through that device.