1 Log into your administration console (usually
http://diskstation:5000)
Open Control Panel
Click on Network Interface tab
Click on Create > Create VPN profile

2 Select “
OpenVPN (via importing a .ovpn file)” and click “
Next“

3 You can find the list of all available locations
here for OpenVPN.
4 Click on “
Linux” link, download and extract the zip file.
Enter the Profile name (name which you’ll see in the Network Interfaces list), your PureVPN
username and
password. Click on Browse button next to “
Import .ovpn file:” and find the file we got from the previous step. Add the ca.crt file in
CA Certificate provided with the ovpn file. Press “
Next“.

5 Enable “
Use default gateway on remote network”
***
If you want, enable “
Reconnect when the VPN connection is lost“
Press “
Apply“

6 On the Network Interfaces menu, right click on your freshly made VPN connection and press “
Connect“, or press “
Connect” button.

7 If the connection was successful, status below the name of connection will say “
Connected“

8 *** Connecting to your Synology from the “Outside” (WAN)
In case you check the “
Use default gateway on remote network” you might have problems connecting to your NAS over the Internet.
If you want security, you need to have this checked.
If you want to access your NAS over the internet, you have to leave this unchecked, but the connection may fail.
The reason for it is that the default gateway redirects all requests that are not within the private network over the VPN connection. You would need to connect to the VPN gateway’s (external) IP, but since it is a shared IP address among everyone connected to it, it just drops the incoming connection, as the server doesn’t know to whom to relay the package