Updated tutorial

Point-to-Point-Tutorial.md

@@ -1,12 +1,11 @@
-## Goals
-* Connect several single nodes via a VPN
-* Nodes should be able to reach each others even through NATs
-* Traffic should be secured with a password
-* Nodes should be accessible by IP addresses and names like `NODE.myvpn`
+## Scenario
+![imgs/point_to_point_scenario.png](Point to point scenario)
+
+Three single nodes should be connected via a secure VPN. `node1` and `node3` have fixed addresses but `node2` has a dynamic address that changes regularly.
 
 
-## Preparations
-To be able to set up the VPN, at least one node needs to be reachable by an
+#### Note
+To be able to set up the VPN, at least one node needs to have a be reachable by an
 unchanging address of hostname. This is normally not the case with common
 DSL uplinks (they change addresses every day). Please see [[Dynamic DNS]] for
 a solution.
@@ -16,9 +15,9 @@ a solution.
 The actual VpnCloud setup is pretty simple.
 
 A new network config in `/etc/vpncloud` has to be created on each node.
-There is an example file to start with in `/etc/vpncloud/example.net`.
+There is an example file in `/etc/vpncloud/example.net.disabled` that explains all the parameters.
 
-    $> sudo cp /etc/vpncloud/example.net /etc/vpncloud/mynet.net
+    $> sudo cp /etc/vpncloud/example.net.disabled /etc/vpncloud/mynet.net
 
 Now that file has to edited to change a few values:
 
@@ -26,21 +25,38 @@ Now that file has to edited to change a few values:
 
 The following values have to be modified:
 
-- **PEERS**: This is a list of all peers that this node should connect to.
-  Only unchanging addresses can be used here. Several addresses can be appended
-  and separated by spaces like `"node1.dyndns.org:3210 node2.dyndns.org:3210"`.
-  All nodes that have an unchanging address should be listed here.
+- **peers**: This is a list of all peers that this node should connect to.
+  Only unchanging addresses can be used here.
 
-- **SHARED_KEY**: This is a shared password for all nodes that secures the
+- **shared_key**: This is a shared password for all nodes that secures the
   communication. It must be the same on all nodes and of course it should be a
   strong password.
 
-- **IFUP**: `ifconfig $IFNAME 10.0.0.X/24 mtu 1400` where `X` is different for
+- **ifup**: `ifconfig $IFNAME 10.0.0.X/24 mtu 1400` where `X` is different for
   every node. It is good idea to use incrementing numbers here and to track the
   assigned numbers and nodes in a list.
 
-- **ENABLED**: This needs to be set to `1` when everything is finished so the
-  network is started automatically.
+This leads to the following configuration files:
+
+#### Node1
+    peers:
+      - node3.example.com
+    shared_key: "mysupersecretkey"
+    ifup: "ifconfig $IFNAME 10.0.0.1/24 mtu 1400"
+
+#### Node2
+    peers:
+      - node1.example.com
+      - node3.example.com
+    shared_key: "mysupersecretkey"
+    ifup: "ifconfig $IFNAME 10.0.0.2/24 mtu 1400"
+
+#### Node3
+    peers:
+      - node1.example.com
+    shared_key: "mysupersecretkey"
+    ifup: "ifconfig $IFNAME 10.0.0.3/24 mtu 1400"
+
 
 After the config file has been set up correctly, VpnCloud needs to be restarted:
 
@@ -48,8 +64,16 @@ After the config file has been set up correctly, VpnCloud needs to be restarted:
 
 If you want to, you can [[associate names with the nodes|Naming Hosts]]. Please note that this procedure has to be done on all nodes.
 
+
 ## Testing the network
 When everything has been setup properly, the connection can be checked using the
 `ping` command:
 
-    $> ping NAME.myvpn
+    $node1> ping 10.0.0.2
+    $node2> ping 10.0.0.3
+    $node3> ping 10.0.0.1
+
+
+## Advanced settings
+- **crypto**: This setting defines the used encryption method. Options are `chacha20` (the default) and `aes256`. Both are pretty secure but `aes256` is only supported on newer CPUs (check support with `vpncloud -V`). If all nodes support `aes256` the method can be changed and might bring some speed improvements.
+- **magic**: This setting can be changed to hide the protocol header and make VpnCloud undetectable. This setting must be the same on all nodes.