NordVPN OpenVPN Tomato Router Setup Guide


 1. Getting started:

  •  If you are following this guide it means you have no problems connecting to your FlashRouter network and accessing your FlashRouter settings. 
  • If you are having trouble accessing your router settings then you can always follow our guide on how to access your router settings or if needed how to reset your router to default Tomato firmware settings before proceeding with your NordVPN client connection setup. 
  • Download setup files from within your account area on the NordVPN website by logging in and then clicking the Download area.
  • Scroll down and click on the Tomato .OVPN configuration files link. A folder will download to your computer containing a full list of NordVPN server locations. Once downloaded extract the contents of this folder to your computer.
  • Hint: Use the program Notepad++ in Windows or TextEdit in MAC OS to open view the contents of your .ovpn file. 

2. Entering NordVPN settings:

In your Tomato FlashRouter settings click on the VPN Tunneling > OpenVPN Client section. 

OpenVPN Client > Client 1 > Basic

Start with WAN

Check this box if you want your VPN connection to startup automatically anytime the router connects to the Internet.

Interface Type




Server Address/Port

At the top of the .ovpn file you downloaded above, there is a line e.g.: 
remote 1194 (or 443) is your NordVPN server location
1194 (or 443) is your NordVPN port

If you wish to change NordVPN connection location,you will need to change this field as well as the Static Key and Certificate Authority fields mentioned below. These new server details will be contained in a new .ovpn file.



Authorization Mode


Username/Password Authentication

Check Username/Password Authentication and enter the Email (or username) and password that you use to login to the NordVPN Website

Extra HMAC authorization (tls-auth)

Outgoing (1)

Create NAT on tunnel

Check this box.

Click Save.

OpenVPN Client > Client 1 > Advanced

Poll Interval


Redirect Internet Traffic

Do not check this box.

Ignore Redirect Gateway (route-nopull)

Do not check this box unless you are using the advanced VPN Routing Policy feature.

Accept DNS configruation


Encryption cipher




TLS Renegotiation Time


Connection Retry


Verify server certificate (tls-remote)

 Do not check this box.

Custom Configuration

 Copy & paste the following lines into the empty space:

tun-mtu-extra 32
mssfix 1450


tun-mtu-extra 32
mssfix 1450
auth SHA512

Click Save. 

***Check this list to see if your Hash Algorithm is SHA512.  Server numbers that are greater than or equal to the number listed below use SHA512 and NOT SHA1. If you are using a NordVPN server with SHA512 you must add in the extra line at the end of your Custom Configuration in Tomato. 

Australia 19
Austria 7
Belgium 3
Brazil 5
Canada 81
Costa Rica 2
Denmark 4
Finland 5
France 13
Germany 135
Indonesia 2
Ireland 2
Italy 8
Japan 7
Luxembourg 5
Mexico 3
Netherlands 52
Netherlands Onion 2
Norway 6
Romania 5
Singapore 9
South Africa 6
Spain 10
Sweden 23
Sweden Onion 2
Switzerland 8
UK 81
US 538

OpenVPN Client > Client 1 > Keys

Note: There is a lot of copy and paste required for this section. Be sure to have your NordVPN .ovpn file open using Notepad++ on Windows or TextEdit on MAC OS.

Static Key

Copy and Paste all contents in between the <tls-auth> and </tls-auth> lines from your .ovpn file starting and ending with:
-----BEGIN OpenVPN Static key V1-----
-----END OpenVPN Static key V1-----

Certificate Authority

Copy and Paste all contents in between the <ca> and </ca> lines from your .ovpn file starting and ending with:

Client Certificate

Leave this field blank.

Client Key

Leave this field blank.

Click Save.

Hint: The NordVPN Key and Certificate are NOT the same for all NordVPN server locations. If you ever wish to change your VPN server location you will need to update these two sections as well as the Server Address field mentioned above. Make sure to check the list above for which Hash Algorithm to use as well. 

 Click the Start Now button to start up the NordVPN connection. 

3. Verifying a successful VPN connection:

How can I tell if my VPN connection is active?

  1. Instead of seeing the Start Now button, you should now see the Stop Now button in your OpenVPN Client area. Click Stop Now to terminate the active VPN connection at any time. 
  2. Visit to verify your new IP address and virtual location. 
    Note: In some cases you may notice that the location is not showing the same location as the server you have input in your router settings; this is because geo tracking tools are often tricked by VPN connections. As long as you see an IP address that is not the same as your normal Internet IP address then you are indeed connected to NordVPN.
  3. Navigate to the Advanced > Routing section in your Tomato firmware settings. If you are connected to a VPN then you will notice a tun11 listed in your Routing Table interfaces (tun12 if you are using OpenVPN Client 2). 

4. Additional Router VPN Features

How can I setup 2 NordVPN client connections on my Tomato FlashRouter?

  1. In the VPN Tunneling > OpenVPN Client section you will see a Client 1 and Client 2 section. It is not possible to run both client VPN connections at the same time, but you can setup both clients and then Start/Stop Now whichever client you like, depending on which VPN server location you want to use. 
  2. Copy all settings used for NordVPN setup as indicated in Client 1 setup above, except this time enter a different server address in the Client 2 > Basic section and different Static Key and Certificate Authority in the Client 2 > Keys section. 
  3. Make sure you do not check the Start with WAN checkbox on both VPN Clients. If you try to connect to both Client 1 and Client 2 at the same time you will likely lose Internet connectivity entirely. 

5. Backing up your settings:

  1. It is always a good idea to save a backup of your working VPN settings after completing this setup, so that in the result of a reset or faulty settings change you can load your working settings in a few simple clicks.
  2. Go to the Administration > Configuration page and name the file "FlashRouter Backup" for easy searching should you ever need it. Click the Backup button. The file will be saved to your computer.
  3. To load your backup go to the Administration > Configuration, and under the Restore Configuration section, click Choose File, select your backup file, then click Restore and give the router a minute or two to load your settings. 

6. Troubleshooting:

  1. If you have any issues with your connection, you can review our NordVPN Troubleshooting page.


Have more questions? Submit a request


Please sign in to leave a comment.
Powered by Zendesk