For OpenVPN I've tried with several VPN hosts and with both UDP and TCP configurations. I also tweaked the OVPN file several times to be compatible with the site and router requirements but it didn't work. This has been frustrating since in part I purchased the router because of this capability and so far I feel the VPN client options very poor.
CactusVPN offers access to twenty VPN servers placed in nine countries, while six VPN protocols are included and by selecting Cactus users are guaranteed to maintain their security and privacy while using the internet as well as hide their identity, location and bypass all restrictions and blocks effortlessly.
20 Tips for Troubleshooting (& Fixing) Your VPN Connection Jan 02, 2018 How do I enable port forwarding on my VPN? - Knowledgebase
Moldova-based CactusVPN is a small VPN provider with a tiny network, but a surprisingly large set of features.. The company's 35 servers in 22 countries isn't going to win any coverage awards, for
What Is WireGuard? (What You Need to Know) | CactusVPN