I can't find a very simple application, with litle to zero configuration on both client and server side which would help one computer to bring other computers on an existing private LAN.
OpenVPN seems like an overkill for this type of thing, and is really hard to get running or debug by various clueless people trying to connect.
Does such a software exist? It's very odd not to.
The Windows provided VPN (PPTP over TCP and GRE) is not what I'm looking for because it is often filtered by ISPs.
Only TCP and UDP solutions pls. Encryption is not needed.
Edit: This question is getting a lot of hate. I just asked if a network bridge software, which configures itself with 2 clicks on a client side without any sort of admin intervention or help, exists. I will never ask another question on serverfault or even answer one. Sorry, but I was better off configuring ovpn and reading error logs than fighting non constructive comments.