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OpenVPN-client

This is a docker image of an OpenVPN client tied to a SOCKS proxy server. It is useful to isolate network changes (so the host is not affected by the modified routing).

This supports directory style (where the certificates are not bundled together in one .ovpn file) and those that contains update-resolv-conf

(For the same thing in WireGuard, see kizzx2/docker-wireguard-socks-proxy)

Why?

This is arguably the easiest way to achieve "app based" routing. For example, you may only want certain applications to go through your WireGuard tunnel while the rest of your system should go through the default gateway. You can also achieve "domain name based" routing by using a PAC file that most browsers support.

Usage

Preferably, using start in this repository:

start /your/openvpn/directory

/your/openvpn/directory should contain one OpenVPN .conf file. It can reference other certificate files or key files in the same directory.

Alternatively, using docker run directly:

docker run -it --rm --device=/dev/net/tun --cap-add=NET_ADMIN \
    --name openvpn-client \
    --volume /your/openvpn/directory/:/etc/openvpn/:ro -p 1080:1080 \
    kizzx2/openvpn-client-socks

Then connect to SOCKS proxy through through localhost:1080 / local.docker:1080. For example:

curl --proxy socks5h://local.docker:1080 ipinfo.io

Solutions to Common Problems

I'm getting RTNETLINK answers: Permission denied

Try adding --sysctl net.ipv6.conf.all.disable_ipv6=0 to your docker command

DNS doesn't work

You can put a update-resolv-conf as your up script. One simple way is to put this file as up.sh inside your OpenVPN configuration directory.

HTTP Proxy

You can easily convert this to an HTTP proxy using http-proxy-to-socks, e.g.

hpts -s 127.0.0.1:1080 -p 8080