Create ipsec-rw-linux.rst

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+================================
+IPsec: Setup Linux Remote Access
+================================
+
+.. contents:: Index
+
+Here you can see the configuration options for all compatible VPN types.
+We assume that you are familiar with adding a new VPN connection.
+
+The tests were done with Ubuntu 18.04 and network-manager-stronswan installed, Ubuntu only supports
+OpenVPN and PPTP with the default install.
+
+----------------------------
+Step 1 - Download Certificte
+----------------------------
+
+Download the Root CA from the OPNsense Firewall since it's needed for all EAP types with IKEv2.
+
+---------------------------
+Step 2 - Add VPN Connection
+---------------------------
+
+Open the network manager and add a new VPN connction. Choose **IPSec/IKEv2**, give it a **Name** and set
+the **Address** to the FQDN matching the one of the certificate at your Firewall.
+
+----------------------------------
+IKEv2 + EAP-MSCHAPv2 or EAP-RADIUS
+----------------------------------
+
+.. image:: images/ipsec-rw-linux-eapmschap.png
+   :width: 60%
+