@Sunshine 

 

Thank you for your response.

 

To answer the questions:

 

• The EB810v is my OpenVPN Server.
• I am assuming that the EB810v is similar or the same firmware as the BE800, please correct me if wrong. 
• I got the EB810v from my ISP, Starhub.

 

Here is a diagram of the topology with an explanation of what happens when the SPI is on and what happens when the SPI is off. In a nutshell, SPI on = does not work, SPI off = works. This should not be the case.

 

Thank you for your help with this.

 

 

 

 

 

 

Sunshine wrote

  @Bussiere 

 

Hi, EB810V is your OpenVPN Server, right? do you have Archer BE800 or not?

Please let us know your network topology and which device/service you are trying to access via the VPN, like https service of the EB810v itself, or https service of a client device within the EB810v LAN network?

 

In addition, EB810v is an ISP model actually, did you get it from your ISP? You could refer to this guide for a try: Why can’t I access or discover certain devices over VPN？

 

Also, I tried the recommendations in the guide, and they did not solve the problem.

@Sunshine

 

I face the same issue and StarHub refers me to TP-Link. I suspect that it is either a feature that has been disabled or firmware bug. TP-LINK should have e a team handles with Starhub, can you help channel this issue to them?