add openvpn

openvpn.md

@@ -0,0 +1,28 @@
+# OpenVPN
+
+Assume you use Archlinux.
+
+Read [OpenVPN](https://wiki.archlinux.org/index.php/OpenVPN).
+
+Read [The update-systemd-resolved custom script](https://wiki.archlinux.org/index.php/OpenVPN#The_update-systemd-resolved_custom_script).
+
+Read [update-systemd-resolved](https://github.com/jonathanio/update-systemd-resolved).
+
+Install [openvpn-update-systemd-resolved](https://aur.archlinux.org/packages/openvpn-update-systemd-resolved/).
+
+Start/enable service:
+
+```sh
+systemctl start systemd-resolved.service
+
+systemctl enable systemd-resolved.service
+```
+
+Edit `client.opvn`:
+
+```txt
+up /etc/openvpn/scripts/update-systemd-resolved
+up-restart
+down /etc/openvpn/scripts/update-systemd-resolved
+down-pre
+```