After <ahref="https://github.com/hwdsl2/setup-ipsec-vpn"target="_blank">setting up your own VPN server</a>, follow these steps to configure your devices. IPsec/L2TP is natively supported by Android, iOS, OS X, and Windows. There is no additional software to install. Setup should only take a few minutes. In case you are unable to connect, first check to make sure the VPN credentials were entered correctly.
1. Click the **Security** tab and select **Layer 2 Tunneling Protocol with IPsec (L2TP/IPSec)** from the **Type of VPN** drop-down menu. Under "Allow these protocols", select the `CHAP` checkbox, and de-select `MS-CHAP v2`.
To connect to the VPN, simply right-click on the wireless/network icon in your system tray, select the new VPN connection, and click **Connect**. You can verify that your traffic is being routed properly by <ahref="https://encrypted.google.com/search?q=my+ip"target="_blank">looking up your IP address on Google</a>. It should say "Your public IP address is `Your VPN Server IP`".
**Note:** A <ahref="https://documentation.meraki.com/MX-Z/Client_VPN/Troubleshooting_Client_VPN#Windows_Error_809"target="_blank">one-time registry change</a> is required if the VPN server and/or client is behind NAT (e.g. home router). Please refer to the linked page, or run the following from an <ahref="http://windows.microsoft.com/en-us/windows/command-prompt-faq#1TC=windows-7"target="_blank">elevated command prompt</a>. You must reboot your computer when done.
1. Check the **Show VPN status in menu bar** checkbox.
1. Click the **Advanced** button and make sure the **Send all traffic over VPN connection** checkbox is selected.
1. Click the **TCP/IP** tab, and make sure **Link-local only** is selected in the **Configure IPv6** section.
1. Click **OK** to close the Advanced settings, and then click **Apply** to save the VPN connection information.
You can connect to the VPN using the VPN icon in the menu bar, or by selecting the VPN in the Network section of System Preferences and choosing **Connect**. You can verify that your traffic is being routed properly by <ahref="https://encrypted.google.com/search?q=my+ip"target="_blank">looking up your IP address on Google</a>. It should say "Your public IP address is `Your VPN Server IP`".
### Android ###
1. Launch the **Settings** application.
1. Tap **More...** in the **Wireless & Networks** section.
Note for Android 6 (Marshmallow) users: On the VPN server, edit `/etc/ipsec.conf` and append `,aes256-sha2_256` to both `ike=` and `phase2alg=` lines. Then add a new line `sha2-truncbug=yes` under section `conn shared` (<ahref="https://libreswan.org/wiki/FAQ#Android_6.0_connection_comes_up_but_no_packet_flow"target="_blank">Reference</a>). Indent lines with two spaces. When finished, run `service ipsec restart`.
Once connected, you will see a VPN icon in the notification bar. You can verify that your traffic is being routed properly by <ahref="https://encrypted.google.com/search?q=my+ip"target="_blank">looking up your IP address on Google</a>. It should say "Your public IP address is `Your VPN Server IP`".
Once connected, you will see a VPN icon in the status bar. You can verify that your traffic is being routed properly by <ahref="https://encrypted.google.com/search?q=my+ip"target="_blank">looking up your IP address on Google</a>. It should say "Your public IP address is `Your VPN Server IP`".
### Chromebook ###
1. If you haven't already, sign in to your Chromebook.
1. Click the status area, where your account picture appears.
1. Click **Settings**.
1. In the **Internet connection** section, click **Add connection**.
1. Click **Add OpenVPN / L2TP**.
1. Enter `Your VPN Server IP` for the **Server hostname**.
1. Enter anything you like for the **Service name**.
1. Make sure **Provider type** is **L2TP/IPSec + pre-shared key**.
1. Enter `Your VPN Username` for the **Username**.
1. Enter `Your VPN Password` for the **Password**.
1. Click **Connect**.
Once connected, you will see a VPN icon overlay on the network status icon. You can verify that your traffic is being routed properly by <ahref="https://encrypted.google.com/search?q=my+ip"target="_blank">looking up your IP address on Google</a>. It should say "Your public IP address is `Your VPN Server IP`".
Based on <ahref="https://github.com/jlund/streisand/blob/master/playbooks/roles/l2tp-ipsec/templates/instructions.md.j2"target="_blank">the work of Joshua Lund</a> (Copyright 2014-2016)
This program is free software: you can redistribute it and/or modify it under the terms of the <ahref="https://www.gnu.org/licenses/gpl.html"target="_blank">GNU General Public License</a> as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.