• Introduction

VPN stands for Virtual Private Network. A VPN helps you access internet resources remotely, securely, and privately with tunneling technology. You might use a VPN for Enhanced Security, Privacy Protection, and Remote Access.

For the detailed introduction and usage scenarios, check this thread: Introduction and Configuration Guide of VPN Function on TP-Link Wireless Routers

• VPN Related Threads/Guides

• User Case Sharing

1. A successful case of resolving the issue of being unable to connect to the VPN server by reinstalling the VPN client software on the computer with an administrator account and modifying the router's time settings: 

Fail to use OpenVPN on TP-LINK router? Read this! 

2. A case where the OpenVPN client was continuously stuck on "connecting" when trying to connect to Proton VPN. Later, the customer confirmed that the Proton account password couldn't be used for devices other than the Proton App. Once they found the correct VPN account credentials, the issue was resolved.

ProtonVPN

3. A successful case where both the OpenVPN Server and OpenVPN Client functions were enabled, the VPN subnet conflict resulted in the VPN Client showing as connected, yet the clients with VPN permissions were unable to access the internet. The issue was resolved by modifying the VPN subnet for one of them.

AX5400 VPN Client

4. Failed to import Wireguard VPN configuration file because the fields in the Wireguard VPN configuration file were not very standardized, check standardized WireGuard VPN configuration file here: Wireguard VPN Client file upload fail