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OpenVPN shuts off, needs manual turning off and on to restore

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OpenVPN shuts off, needs manual turning off and on to restore

OpenVPN shuts off, needs manual turning off and on to restore
OpenVPN shuts off, needs manual turning off and on to restore
2025-08-12 04:55:43 - last edited a week ago
Tags: #VPN #OpenVPN
Model: ER605 (TL-R605)  
Hardware Version: V2
Firmware Version:

 

Hi team

 

So for about 5 days now, OpenVPN shuts off randomly. Basically the client is unable to connect with a request timeout error message. Checking if 1194 port is open results in an error.

But as soon as you access the controller, go into the OpenVPN instance, you turn it off, give it 5 seconds and your turn it back on - everything returns back to normal for... almost 24 hours. Then this scenario repeats itself, we go in, solve it, et cetera.

This is what we have on the logs (the screenshot above).

This is happening to about 6 of the 13 controllers we are currently managing. All of them are updated to the latest version and the issue started 2 day before TP-Link issued the latest update.

 

Let me know if you are experiencing this as well, or if you have some work around. Thank you.

P.S. I don't know why attaching the image sets it up above the text ?!?!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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#1
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1 Accepted Solution
Re:OpenVPN shuts off, needs manual turning off and on to restore-Solution
2 weeks ago - last edited a week ago

  @laurentiu907 

laurentiu907 wrote

Circling back with updates, will reply to the open ticket as well.

 

The situation is this:

 

ER605 v2.0 - 2.2.3 - OK 

ER605 v1.0 - 1.3.1 - OK

ER605 v2.20 - 2.2.6 - ISSUES

ER605 v1.0 - 1.3.1 - OK

ER605 v2.0 - 2.2.6 - ISSUES

ER605 v2.20 - 2.2.6 - ANALYSING, restarting daily because they critically need it. I'll keep you posted, but they restart in minutes once the issue arises because they have remote workers.

 

I have other Omada setups at hand, but I don't have OpenVPN set up there. Let me know and we can jump on it.

Let me know what else is needed. All of them are linked to the cloud, et cetera.

There is an unusual CPU surge based on the check. 

We assume that this was caused by the OVPN port, which was scanned and deliberately flooded by someone on the Internet. 

You can consider changing to a different port for the OVPN. Default 1194 is a known port and if someone find that you have this port available for traffic, they can exploit and start a flood. 

 

For the other site, you mentioned that they don't face this issue; it could be that they don't have an open port like 1194(for OVPN), or their IP is not known on the Internet. Or they don't have a public IP. 

This is not concluded as a firmware issue or any other. 

 

This is the preliminary analysis. As I speculated before, somehow, there is a fluctuation-like incident that happened. 

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#29
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Re:OpenVPN shuts off, needs manual turning off and on to restore
2025-08-12 08:12:58

  @laurentiu907 

The log appears to be unrelated.

You might wanna create a diagram to illustrate the relation of the VPN. 

 

And your firmware is unclear. The ER605 firmware has been released for some time, during which no similar reports have been created. 

 

I assume this is a problem with your WAN side. Or client loses the connection due to its environment or network fluctuation. 

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#2
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Re:OpenVPN shuts off, needs manual turning off and on to restore
3 weeks ago - last edited 3 weeks ago

Same router, same version, same problem. Same time when the problem appeared. It's the same on L2TP and the latest firmware version solved a certain problem but it seems that it did not:

 

- fixed the issue where the static route for l2tp vpn doesn’t take effect after re- enabling l2tp vpn.

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#3
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Re:OpenVPN shuts off, needs manual turning off and on to restore
3 weeks ago

  @p3r3s That is correct. And what puzzles me is that it's random, or every 24 hours or smth....

Basically if clients are connected 24/7 it stays on. When the last person disconnects, the entire service goes down.

There is nothing on the logs (well not the public ones)

And also, only some specific ones are affected, I have other set up absolutely the same which are not having any issues at all.

currently I'm manually restarting the VPN instance... but hoping for an update soon enough.

And this came with this last update. It always has worked flawlessly.

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#4
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Re:OpenVPN shuts off, needs manual turning off and on to restore
3 weeks ago

Same problem here. Also started some days ago. Until then it was rock solid stable.

 

Hope we can soon continue to work from remote again.

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Re:OpenVPN shuts off, needs manual turning off and on to restore
3 weeks ago

  @p3r3s  @Anton320 

p3r3s wrote

Same router, same version, same problem. Same time when the problem appeared. It's the same on L2TP and the latest firmware version solved a certain problem but it seems that it did not:

 

- fixed the issue where the static route for l2tp vpn doesn’t take effect after re- enabling l2tp vpn.

Strange enough, I am not seeing the firmware from the OP. Where do you conclude that you have the same firmware as the OP? 

 

 

Anton320 wrote

Same problem here. Also started some days ago. Until then it was rock solid stable.

 

Hope we can soon continue to work from remote again.

Same for you. Did you engage in a firmware upgrade? What comes to the result that it is the same problem?

 

You can share more info regarding your firmware details. 

As well as specify your network diagram and the role of the router in the this VPN connection. 

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#6
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Re:OpenVPN shuts off, needs manual turning off and on to restore
3 weeks ago

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  @Clive_A here are the screenshots with the firmware versions - as requested.

 

 

For the other request (the network diagram and the role of this router in this VPN connection ?!?!) - I believe I didn't make myself clear enough.

The Omada router (ER605) IS the OpenVPN server for the outside clients. There is no diagram to be drawn. The TP-Link router acts as an OpenVPN instance for the remote clients that need to connect by VPN to the Omada network resources.

 

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#7
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Re:OpenVPN shuts off, needs manual turning off and on to restore
3 weeks ago

  @Clive_A The problem appeared spontaneous. It was not due to a system upgrade. It happens randomly since a week ago. Sometimes when a device is connected, sometimes when I try to connect. 

 

The router is used as OpenVPN server to serve one single device at one time over the internet. The client is an Anrdoid phone or a Windows work station. 

 

 

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#8
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Re:OpenVPN shuts off, needs manual turning off and on to restore
3 weeks ago - last edited 3 weeks ago

  @Anton320 

Anton320 wrote

  @Clive_A The problem appeared spontaneous. It was not due to a system upgrade. It happens randomly since a week ago. Sometimes when a device is connected, sometimes when I try to connect. 

 

The router is used as OpenVPN server to serve one single device at one time over the internet. The client is an Anrdoid phone or a Windows work station. 

 

 

That would be strange. If there is no upgrade at all, then that means the system is intact. Not a config, not a server, not a firmware issue. Nothing has been changed, and it happens; this could be a client-side issue. Wireshark may be needed. Just curious, are you guys from the same area? Same country?

 

Or did you recently upgrade the OVPN software? And OVPN's official got some changes in its new release, somehow affecting the system.

 

What's your OVPN software on the client that experiences the issue?

Log? 

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#9
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Re:OpenVPN shuts off, needs manual turning off and on to restore
3 weeks ago - last edited 3 weeks ago

  @laurentiu907  First, I switched from OpenVPN to L2TP/IPSec (same problem). I've been using Wireguard since yesterday, and it's been working fine for the first 24 hours.

 

Hardware Version: ER605 v2.0

 

Firmware Version: 2.3.0 Build 20250428 Rel.18967

 

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#10
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Re:OpenVPN shuts off, needs manual turning off and on to restore
3 weeks ago

  @Clive_A I am in The Netherlands. Android and Windows client are resp. on version 3.7.1 and 3.7.2.

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#11
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