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How to join a QNAP Turbo NAS to a VPN network?

A virtual private network (VPN) extends a private network across the Internet. It enables devices to send and receive data across shared or public networks as if it were directly connected to the private network with the high security and management policies of the private network.

The QNAP Turbo NAS provides the VPN client service, which can connect to a VPN server via PPTP or OpenVPN to establish a secure connection and remotely access the private network. The Turbo NAS also supports saving multiple VPN settings to easily switch between different connections.

Setting up the VPN client service

Follow the below instructions for the first time setup of the VPN client service on the Turbo NAS.

  1. Before you start.
  2. Connect a VPN server via PPTP.
  3. Connect a VPN server via OpenVPN.

1. Before you start

Before starting the VPN client service, please ensure that your Turbo NAS has been set up as follows:

  1. The Internet connection is normal.
  2. Your QTS version is 4.1.2 or later.
  3. If you have an active VPN server service, you must disable it. The client and server services cannot be run at the same time.

2. Connect to a VPN Server via PPTP

The Point-to-Point Tunneling Protocol (PPTP) is a commonly-used method for implementing VPN and is supported by most clients, including Windows, Mac OS X, Linux, and mobile devices.

Go to "Control Panel" and click "VPN Client".

Click "Add" and chose "PPTP" to connect a VPN server.

Enter the connection configuration settings, including the profile name, server address (that you want to connect to), and the username and password of the VPN server.

Choose any of the following authentication mechanisms from the "Authentication" menu to protect VPN client’s password during authentication:

  • MS-CHAPv2: The password will be encrypted using Microsoft CHAP version 2.
  • MS-CHAP: The password will be encrypted using Microsoft CHAP version 1.
  • PAP: The password will not be encrypted.
  • CHAP: The password will be encrypted using CHAP.

If you choose MS-CHAP or MS-CHAPv2, go to the "Encryption" menu and select an option:

  • None: The VPN connection will not be encrypted.
  • Medium (AES 40/128 bit): The VPN connection will be encrypted using a 40-bit or 128-bit key.
  • High (AES 256 bit): The VPN connection will be encrypted using a 256-bit key (the highest-possible level).

Tick the following checkboxes depending on your configurations:

  • Use the default gateway on remote network: This will allow all packets to be transferred via the VPN server.
  • Allow other network devices to connect to the VPN through the NAS: This will allow network devices on the same LAN as the NAS to connect to the same VPN.
  • Reconnect when the VPN connection is lost: This will automatically reconnect to the VPN server when the connection is lost.

Select "Connect" to start.

Please note:
If you check "Use the default gateway on remote network", the default gateway on your Turbo NAS will change to the VPN server’s default gateway.

If you check "Allow other network devices to connect to the VPN through the NAS", the network device can access the VPN via the Turbo NAS. To enable this function, you must change the default gateway on that other device. Using a Windows PC as an example:

Go to "Control Panel" > "Network an Sharing Center" > "Change adapter settings"

Right click on the connection icon and choose "Properties"

Select "Internet Protocol Version 4 (TCP/IP)" and click "Properties".

Choose "Use the following IP address" and change the Default gateway to the IP address on the Turbo NAS operating VPN Client service (in this case, it’s 192.168.1.14), then click "OK".

3. Connect to a VPN Server via OpenVPN

The Turbo NAS also supports OpenVPN, which is an open source solution for VPN services. It protects a VPN's connection with the SSL/TLS encrypting mechanism. It is also available on Windows, Mac OS X, Linux, Android and iOS.

Go to "VPN Client", click "Add" and choose "OpenVPN" to connect to a VPN server.

Enter the connection configuration settings, including the profile name, server address (that you want to connect to), and the username and password of the VPN server. Choose the same configuration as the OpenVPN server in "Server Port". Click "Certification" to import the certificate (ca.crt) exported from the OpenVPN server. Tick the following checkboxes depending on your configurations:

  • Enable compressed VPN link: This will compress data before transferring via VPN.
  • Use the default gateway on remote network: This will allow all packets to be transferred via the VPN server.
  • Allow other network devices to connect to the VPN through the NAS: This will allow network devices on the same LAN as the NAS to connect to the same VPN.
  • Reconnect when the VPN connection is lost: This will automatically reconnect to the VPN server when the connection is lost.

Click "Connect" to start.

If you check "Use the default gateway on remote network", the default gateway on your Turbo NAS will change to the VPN server’s default gateway.

If you check "Allow other network devices to connect to the VPN through the NAS", please refer to the tutorial above for more details.

Release date: 2014-12-22
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