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54 lines
1.7 KiB
ReStructuredText
54 lines
1.7 KiB
ReStructuredText
.. _openbsd:
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OpenBSD
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=======
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1. :ref:`Install the mitmproxy certificate on the test device <certinstall>`
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2. Enable IP forwarding:
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>>> sudo sysctl -w net.inet.ip.forwarding=1
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3. Place the following two lines in **/etc/pf.conf**:
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.. code-block:: none
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mitm_if = "re2"
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pass in quick proto tcp from $mitm_if to port { 80, 443 } divert-to 127.0.0.1 port 8080
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These rules tell pf to divert all traffic from ``$mitm_if`` destined for
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port 80 or 443 to the local mitmproxy instance running on port 8080. You
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should replace ``$mitm_if`` value with the interface on which your test
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device will appear.
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4. Configure pf with the rules:
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>>> doas pfctl -f /etc/pf.conf
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5. And now enable it:
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>>> doas pfctl -e
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6. Fire up mitmproxy. You probably want a command like this:
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>>> mitmproxy -T --host
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The ``-T`` flag turns on transparent mode, and the ``--host``
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argument tells mitmproxy to use the value of the Host header for URL display.
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7. Finally, configure your test device to use the host on which mitmproxy is
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running as the default gateway.
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.. note::
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Note that the **divert-to** rules in the pf.conf given above only apply to
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inbound traffic. **This means that they will NOT redirect traffic coming
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from the box running pf itself.** We can't distinguish between an outbound
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connection from a non-mitmproxy app, and an outbound connection from
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mitmproxy itself - if you want to intercept your traffic, you should use an
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external host to run mitmproxy. Nonetheless, pf is flexible to cater for a
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range of creative possibilities, like intercepting traffic emanating from
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VMs. See the **pf.conf** man page for more.
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.. _pf: http://man.openbsd.org/OpenBSD-current/man5/pf.conf.5
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