Openvpn upload speed limited to 355kb/s

Installing and Using OpenWrt
1

Hello,

I am using openwrt on my router for a couple of years, but I have the following problem when using OpenVPN.

Scenario: When connecting using the openvpn client to my router from another location everything is working fine. When I want to copy something from a server behind the router with openwrt the speed of the upload is limited to 355kb/s. If I upload something to the server then the speed goes to 2Mb/s.
The internet speed when running speedtest is ~90MB/s upload/download.

So I believe that there is a setting that I need to modify at the level of the interface to allow to increase the speed of the upload.
I have checked the load of router and it isn't that high to not allow higher speed. The server is connected to the router via a 1GB connection.

Router model: TP-Link TL-WR1043ND v2.x

Can you suggest on what I can do to increase the speed of the upload ?

Thank you

2

This router is rather old. Verify with top or htop that CPU during the transfer is not over utilized.

1 Like
4

I already verified and the CPU doesn't go above 10%. It also has enough RAM available.
I have already search the forum and I haven't found any answer or anybody with the same problem.

Version running is 19.07.5 on the router.

5

Can you check cables? Because i've seen similar issues in past.

6

Already tested this.

If I am in the network with my laptop transfer between the laptop and the server is around 10mb/s.

Download speeds and upload speeds to the internet from the server is also consistent with 10mb/s.

So for this reason I have excluded the cables.
What I find strage is that the speed is 355kb/s when uploading data from the server, but 2mb/s when downloading data through the same vpn.

I am thinking that it might be an issue with the TAP adapter that I am using, but I am unsure at the moment as I have been able to find any limitation concerning this.