@Clive_A  can you help me please?

  @mgaray07 

The ER8411 is a very good router for many things, but on OpenVPN it gets beaten. so don't have too high expectations for OpenVPN on ER8411, I have the same experience as you, about the same speed too.(about 20-30Mbps) so I've given up on OpenVPN and also Wireguard (works but is completely misdesigned). I have moved all these services to another router until it is fixed.

to be honest i don't think it will ever be fixed. TP-Link has not yet found out what the problem is or they don't want to find out.

so don't spend a lot of time trying to solve the problem, you can't solve it, I've been trying for over a year and finally gave up hope for a solution

OpenVPN is also outdated and not compatible with other modern OpenVPN servers and, like Wireguard, lacks the possibility of hostname in the server field when router is client.

in fact, the ER706W is twice as fast as the ER8411 when router is client to same OpenVPN server. how to explain that?

and router I use for OpenVPN and Wireguard now do 200Mbps on OpenVPN to same server and even same config file I use on ER8411. and on a weaker hardware than ER8411.

when copy a file in OpenVPN tunnel now is speed 223 Mbps so the bottleneck is not the server.

  @Clive_A 

Hello. 

The internet speed is 200Mbps symetric. And in the another point (outside the company) I have 100Mbps. The problem is that the tunel is just working with 30 Mbps, and I bought this router because of the publicity that says I can use the vpn with higher speed. Obviously it woud be restricted to my ISP speed. 

Can you help me please?

  @MR.S 

Which router do you recommed me? I need a router with faster vpn. I bought this one for that reason. But I am looking that it is not working as it shoud do it. Also I need load balacing and link backup.

regards

  @mgaray07 

I do prety mutch same as you, my experience is also the same,slow very slow OpenVPN have never worked, and problably never will, I by mine in November 2022 and created a case on it but there have never been fixed so I have olso giving up that.

this router is a good replacment for you.

Unifi UDM-Pro or UXG-Pro

UDM-PRO has built-in controler and is cheaper and is better than the ER8411

UXG-Pro need controller and is more expensive.and also a bether chice than ER8411

Wireguard and OpenVPN is pretty much plug and play, IPsec is bether on ER8411 so I use both. :-)

But my best avice for you is a UDM-PRO from unifi. then you dont need a controller and its cheap. about 200MBps on OpenVPN and 400-500 Mbps on Wireguard.