Not so sure if EB810v still suffers the following issue -- basically
OpenVPN server does not work.
Cannot access LAN through OpenVPN connection
https://community.tp-link.com/en/home/forum/topic/796908
(same as earlier reported issue --
https://community.tp-link.com/en/home/forum/topic/661992).
Answer from TP-Link Support Staff.
EB810v is a customized device specifically designed for local Service Providers. Its software is tailored to meet the unique requirements of these providers, ensuring alignment with their specific needs. While our technical support team is adept at providing general guidance and suggestions for products with standard, generic firmware. However, due to the specialized nature of the firmware on your device, our ability to provide troubleshooting may be limited.