L2TP+GRE over OpenVPN?

Question

VPN

Hello.

Company A has a corporate proxy server, there is no direct access to the Internet.

There is, of course, an ssh & socks5 tunnel through the aforementioned proxy, but this obviously won't help here.

HTTPS and the CONNECT method on the proxy are allowed.

Task: through this proxy of company A, connect to another corporate VPN of company B.

VPN connects via L2TP & GRE, connection is possible only from a corporate laptop of company B, which can physically be included in the network of company A, well, there is access to the proxy.

In addition to the OpenVPN tunnel through the 443 proxy port, inside which you can try to raise an L2TP + GRE tunnel to the network of company B, nothing comes to mind.

Do you think this will work?

Answer 1

OpenVPN works without problems through HTTP proxies.
If I understand the question correctly.

Answer 2

I don't see any obstacles. The overhead turns out to be non-sour, but what can you do.