I'm working on setting up a firewall + openvpn on a linux/systemd machine.
I have these pieces to the puzzle.
Physical Ethernet interfaces, INT & EXT Virtual TUN/TAP interface
Shorewall 4/6 OpenVPN
Systemd controls the start/stop of Shorewall & OpenVPN.
I'm confused at what's supposed to be controlling the up/down of the interfaces
-- the OS? Shorewall? OpenVPN?
Especially when OpenVPN or Shorewall gets restarted, what ORDER should all the
dependencies be in?
E.g., if I stop OpenVPN, should Shorewall be stopped before or after? What
about the TUN interface? etc.
In the docs and online I found bits and pieces but so far no good, kitchen-sink
tutorial.
I'd appreciate any good outlines, recommendations, pointers to tutorials etc.
Dave G.
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