Created openvpn (markdown)

howto/openvpn.md

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+# Example Configuration, if you have direct connection to your peer
+
+* Replace <PEER_NAME> with a self chosen name to identify this peer
+* Replace <PROTO> with either `udp` or `udp6`, depending if you reach your remote peer with ipv4 o ipv6
+* Replace <REMOTE_HOST> with the public ip address of your peer
+* Replace <REMOTE_PORT> with the port number, where your peer's openvpn daemon listen for traffic
+* Replace <LOCAL_HOST> with your public ip
+* Replace <INTERFACE_NAME> with a self chosen name, this will be the name of your network interface (tun device) for this peering
+* Replace <LOCAL_GATEWAY_IP> with your own dn42 ip address
+* Replace <REMOTE_GATEWAY_IP> with dn42 ip address of your peer
+
+```
+#/etc/openvpn/<PEER_NAME>
+daemon
+proto       <PROTO>
+mode        p2p
+remote      <REMOTE_HOST>
+rport       <REMOTE_PORT>
+local       <LOCAL_HOST>
+lport       <LOCAL_PORT>
+dev-type    tun
+dev         <INTERFACE_NAME>
+comp-lzo
+persist-key
+persist-tun
+ifconfig    <LOCAL_GATEWAY_IP>  <REMOTE_GATEWAY_IP>
+secret /etc/openvpn/<PEER_NAME>.key
+```
+
+then create a new key and share it with your peer
+
+```
+$ openvpn --genkey --secret /etc/openvpn/<PEER_NAME>.key
+```