This article explains how to connect your iOS device to the VPN Server on a Synology NAS. If you want to connect to the VPN Plus Server on a Synology Router, please refer to this article.

• VPN server: the VPN Server package on a Synology NAS.
• VPN client: iOS devices. We take iOS 13 as an example in this article. The actual steps may vary across OS versions and devices.

• Before you start
• Set up an OpenVPN connection
• Set up an L2TP/IPSec VPN connection

Before you start

1. Set up VPN Server on a Synology NAS (refer to this article).
2. Ensure the Internet connectivity of the Synology NAS. Set up port forwarding rules if needed (refer to this article).

Set up an OpenVPN connection

1. Go to DSM > VPN Server > OpenVPN via the web browser on a computer.
2. Click Export configuration to download a .zip file, and extract it to get VPNConfig.ovpn and README.txt.
3. Open VPNConfig.ovpn with a text editor and replace "YOUR_SERVER_IP" with the public IP address or domain name of your Synology NAS. If you wish to configure the OpenVPN server as the default gateway of your iOS device, remove the hashtag from the line "redirect-gateway def1".
   
4. Save the VPNConfig.ovpn file to your iOS device.
5. On your iOS device, open Apple App Store to download and install OpenVPN Connect.
6. Open OpenVPN Connect and go to Import Profile > FILE.
7. Select the VPNConfig.ovpn file and tap IMPORT.
8. Enter your DSM username in the Username field and tap ADD.
   
9. Switch on the toggle to start an OpenVPN connection.
   
10. Tap CONTINUE in the pop-up message to proceed with the connection. You don't need to manually import a certificate at this step because the client certificate has been included in the configuration file.
    
11. When CONNECTED displays on the Profiles page, you have established the OpenVPN connection through VPN Server on your iOS device.

Set up an L2TP/IPSec VPN connection

1. On your iOS device, go to Settings > General > VPN.
2. Tap Add VPN Configuration… to create a VPN profile.
3. Configure the following settings and tap Save:

   Option	Operation
   Type	Select L2TP from the drop-down menu.
   Description	Enter a name for your VPN profile.
   Server	Enter the public IP address or domain name of your Synology NAS.
   Account	Enter the username of your DSM account.
   Password	Enter the password of your DSM account.
   Secret	Enter the IPSec pre-shared key configured in VPN Server (check it at DSM > VPN Server > L2TP/IPSec).
   Send All Traffic	Enable this option to send all your traffic via the VPN connection.

   
4. Tap the VPN profile you have added.
5. Toggle on the switch beside Status.
   
6. When the status becomes Connected, you have established the L2TP/IPSec VPN connection through VPN Server on your iOS device.