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Data channel VPN
================
This example illustrates a layer2 VPN running over a WebRTC data channel.
First install the required packages:
.. code-block:: console
$ pip install aiortc
Permissions
-----------
This example requires the CAP_NET_ADMIN capability in order to create and
configure network interfaces. There are two ways to achieve this:
- running the script as the root user. The downside is that the script will be
run with higher privileges than actually needed.
- granting the CAP_NET_ADMIN capability to the Python interpreter. The downside
is that *all* Python scripts will get this capability so you will almost
certainly want to revert this change.
.. code-block:: console
$ sudo setcap CAP_NET_ADMIN=ep /path/to/python3
Running
-------
On the first peer:
.. code-block:: console
$ python3 vpn.py offer
On the second peer:
.. code-block:: console
$ python3 vpn.py answer
Copy-and-paste the offer from the first peer to the second peer, then
copy-and-paste the answer from the second peer to the first peer.
A new network interface will be created on each peer. You can now setup these
interfaces by using the system's network tools:
.. code-block:: console
$ ip address add 172.16.0.1/24 dev revpn-offer
and:
.. code-block:: console
$ ip address add 172.16.0.2/24 dev revpn-answer
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