Mwan3 and OpenVPN load balancing

Hi, can anyone help me with the configuration for a mwan3 setup with OpenVPN on each link.

I want 3 WAN ports to go through VPN then to load balance 3 tun devices and "output" that over a LAN port.

I already know how to setup mwan3 with the proper ports and everything, but I want my IP to stay constant.


That is not helpful at all, because I already know how to configure mwan3. Here's my config: I want to do it with OpenVPN.

Read carefully.
Note stickiness, metric and weight values.

You don't understand what I want to do. I want my IP to stay the same but to use both connections to get balanced link and aggregate speed of the two links.

Describe in detail, how do you see it.
Because those tasks contradict each other.
You get one more IP as soon as you push traffic to the second link.

The external IP from the point of view of the website I'm vising will always be the same -- the IP of the VPN server. The VPN server does NAT to two clients, both of which have different IPs and are on different ISPs. The mwan3 package balances two TUN interfaces so that I keep my IP the same (the IP of the VPN server), but gain more bandwidth.

It doesn't work like that.
Your IP from the point of website is the last host which utilizes NAT.
Website sends all the outgoing traffic to your IP, however it doesn't remember the route of incoming traffic.
And there's no predefined route for outgoing traffic, it uses the shortest route to your IP from its own point.
That's why load balancing makes sense when you split the traffic between different IPs for different websites.
In other words, if you want to implement load balancing, you need to utilize more than single IP.

I still don't think you understand me. It's possible, I've seen it done, but I don't know if OpenWrt is capable of it. Probably is, but again nobody knows how to help me configure it, or wants a few thousand $ per month for a proprietary solution (i.e.


-------> WAN1 -> VPN -> WWW
-- ME
-------> WAN2 -> VPN -> WWW

ME being magically load balanced to two WANs.

OK, I think, I understand you now.
You want to aggregate VPN-interfaces (TUN) on OpenWrt (VPN-client) to increase total bandwidth via remote gateway providing NAT (VPN-server)?

How is the VPN connected to the internet? Is there a really fat WAN3 between VPN and WWW that is at least as fast as WAN1 + WAN2?

Anyway, I don't think MWAN3 will get you any closer to your goal. It does not support connection bonding. It may be possible to do it between an OpenVPN server and client, or using the kmod-bonding module in some way. I have no idea how, though.

The VPN server is connected with a 1 Gbps link in a datacenter, however, it's close to me so the ping is about 3-4 ms (from my connection)..

as @Per said; neither openvpn nor mwan will help you with what you want.
bonding a tap-vpn will also balance and not aggregate afaik.

maybe try like

It won't bond, but will speed up multithreaded download, and for more users on the network it's good enough.

I'll take a look at OpenMPTCPRouter with a RPI3B

As I can see there're 2 tasks:

  1. Load balancing for VPN-traffic through WAN-interfaces.
  2. Load balancing for all the other traffic through VPN-interfaces.

It should be possible to solve #1 with mwan3.
Better if VPN-server allows floating IP-addresses for VPN-clients.
As for #2, it requires testing and may be tricky.
Your mwan3 configuration from above is implementing #1, but missing #2.