On Linux, you could use a command such as this to NAT the VPN client traffic to the internet: iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j MASQUERADE This command assumes that the VPN subnet is 10.8.0.0/24 (taken from the server directive in the OpenVPN server configuration) and that the local ethernet interface is eth0.
How to Connect to L2TP/IPsec VPN on Linux All we need to do now is tell Linux to route traffic to this subnet over the VPN connection. For the purposes of this tutorial, we will assume that the remote subnet is 10.0.5.0/24 and the VPN server has an internal address of 10.0.5.1, as it was in our VPN server tutorials. MOFO Linux download | SourceForge.net Feb 15, 2019 How to install and set up Softether VPN Client for Ubuntu
vpn - Route all traffic through OpenVPN - Ask Ubuntu
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Kali Linux – Ensuring Traffic is Only Sent via OpenVPN Mar 28, 2019 How to Set Up A OpenVPN VPN on Linux (Ubuntu) | hide.me