ebta/open-vpn-ubuntu-20.04.md

## open-vpn-ubuntu-20.04.md

      
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              open-vpn-ubuntu-20.04.md
            
          
    1. Update your system

First, run the apt command to apply security updates:
sudo apt update
sudo apt upgrade
2. Download and run openvpn-install.sh script

DOwnload installation script using short url as follow and update chmod :
wget https://git.io/vpn -O openvpn-ubuntu-install.sh
chmod -v +x openvpn-ubuntu-install.sh
sudo ./openvpn-ubuntu-install.sh
Select UDP (recomendded), Port default, DNS use 1.1.1.1 or Google, client name, just give some name for example client-vpn, then openvpn will generate file client-vpn.ovpn in the /root directory
3. Check status, start, stop or restart service

sudo systemctl status openvpn-server@server.service
sudo systemctl start openvpn-server@server.service
sudo systemctl stop openvpn-server@server.service
sudo systemctl restart openvpn-server@server.service
4. Using opvn file

On Windows, install OpenVPN GUI and load client-vpn.ovpn file. From taskbar, right click OpenVPN icon and select appropriate vpn and click connect. OpenVPN will generate private/local IP addresses such as 10.8.0.1/32
5. Test/Verify connection

ping 10.8.0.1 #Ping to the OpenVPN server gateway
ip route #Make sure routing setup working
## the following must return public IP address of OpenVPN server ##
dig TXT +short o-o.myaddr.l.google.com @ns1.google.com
6. Add or remove a new VPN user with a certificate

You need to run the same script again for adding or removing a new VPN user to TLS certificate. For instance:
$ sudo ./openvpn-ubuntu-install.sh
This is summary from
Ubuntu 20.04 LTS Set Up OpenVPN Server In 5 Minutes