Merge branch 'post-wireguard-android'

content/post/wireguard-vps-android.md

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+title = "Wireguard Gateway & Android"
+date = 2019-07-07T14:41:00+02:00
+author = "MH"
+cover = ""
+tags = ["VPN", "Wireguard", "Android", "Setup"]
+description = "Setup a Linux Wireguard Gateway and connet with Android"
+showFullContent = false
+draft = false
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+
+# Setup your Linux Server
+
+Your Linux server should be accessible via a public IP by UDP.
+If the IP address changes, use DynDNS.
+
+First **install WireGuard** on your Linux server. On the official website you will find
+the right way for your Linux distro:
+[WireGuard.com/install](https://www.wireguard.com/install/)
+
+Then **configure** the Gateway.
+We will use the range 100.64.0.0/10 (RFC 6598) because it doesn't colide with private IPv4 adresses (RFC 1918).
+
+    echo '[Interface]'                   > /etc/wireguard/wg0.conf
+    echo "PrivateKey = $(wg genkey)"    >> /etc/wireguard/wg0.conf
+    echo 'ListenPort = 50002'           >> /etc/wireguard/wg0.conf
+    echo "Address = 100.64.0.1/10"      >> /etc/wireguard/wg0.conf
+
+    iptables -t nat -A POSTROUTING -s 100.64.0.0/10 -o eth0 -j MASQUERADE
+    systemctl enable --now wg-quick@wg0
+
+To get the public key (you need it later on):
+
+    wg pubkey <<<$(grep PrivateKey /etc/wireguard/wg_obermui.conf  | cut -d ' ' -f3)
+
+Now the gateway is configured and running. To get some information, type in wg and use systemd:
+
+    systemctl status wg-quick@wg0
+    wg show
+
+# Setup your Android
+
+Download the App from [F-Droid](https://f-droid.org/en/packages/com.wireguard.android/) or [Google Play](https://play.google.com/store/apps/details?id=com.wireguard.android).
+
+In WireGuard, you must manually set an IP address for each client. The ``100.64.0.0.0.0/10`` area has hosts from ```100.64.0.1`` to ``100.127.255.254```, the first one is already occupied by the gateway, so we use ```100.64.0.0.2````.
+
+  ![]({{<siteurl>}}img/wireguard-android/A.jpg) |  ![]({{<siteurl>}}img/wireguard-android/B.jpg) |  ![]({{<siteurl>}}img/wireguard-android/C.jpg)
+ -------|----------|--------
+ Open the app and "Create from scratch" |  Generate a key pair. Make a note of the public key, you will need it later. Name the configuration and add the client IP address with 32 mask.  | Add a peer. Now enter the gateway information. Allowed IPs is ```0.0.0.0/0```.
+
+# Add Android Client to Server
+
+Now add the client information to the gateway and restart the interface.
+
+    [Peer]                            >> /etc/wireguard/wg0.conf
+    PublicKey = <Client-Pub-Key>      >> /etc/wireguard/wg0.conf
+    AllowedIPs = 100.64.0.2/32      >> /etc/wireguard/wg0.conf
+
+    systemctl restart wg-quick@wg0 && ystemctl status wg-quick@wg0
+
+
+# Sources
+[Wireguard Quickstart](https://www.wireguard.com/quickstart/)
+
+Heise [Besser tunneln](https://www.heise.de/select/ct/2019/5/1551091519824850)
+
+Witepaper [WireGuard: Next Generation Kernel Network Tunnel](https://www.wireguard.com/papers/wireguard.pdf)
+
+Demo Video [Test WireGuard VPN net roaming](https://video.obermui.de/videos/watch/5009724a-a670-4130-bc99-4ab820773da6)