1. Based on your file list from /tmp/openvpn, we can see that your router uses "client" as the base name for client keys/certificates, and "server" for the base name for server keys/certificates. That's compatible with the PDF. 2. Based on the OpenVPN config files you dumped, we can see the OpenVPN server is loading dh1024.pem.

OpenVPN Config Generator - Windscribe Windscribe is a desktop application and browser extension that work together to block ads and trackers, restore access to blocked content and help you safeguard your privacy online. OpenVPN - UntangleWiki May 15, 2020 VPN Setup guide for OpenVPN for Android OpenVPN for Android is an open source client compatible with all versions of Android 4.x (Ice Cream Sandwich) and later. Most devices released since 2012 are running Android 4.x or later. Download the OpenVPN config files either directly to your android device or to a seperate PC and unzip the file. OpenVPN on Android : installation and configuration step

VPN Setup guide for OpenVPN for Android

Oct 07, 2019 OpenVPN on android - Software - MoDaCo

OpenVPN on android - Software - MoDaCo

[Solved] Can't connect from Windows GUI, but OK - OpenVPN Jan 05, 2016