Why is OpenVPN cutting off all network connections?

Question

openvpn

When you turn on the OpenVPN client, all other connections are cut off, including you cannot get to the computer using its non-vpn-ip.
What's wrong, how to fix it?

Answer 1

Because the route is prescribed, which drives all packets by default to the IP address of your VPN. If you need to send only certain destinations through the VPN, then change the default route to the address of your router, and wrap individual subnets through the VPN.

Answer 2

The "redirect-gateway def1" parameter is responsible for this; when using it, the VPN server will take all the routes on itself.
You can comment it out and add only the subnets you need, like this:
route 192.168.1.0 255.255.255.0 10.10.10.1