How to forward a port to a client through OpenVPN?

Question

openvpn

The bottom line is - I need to make it possible to connect to my local machine on port 80 (the machine behind the provider's nat). Raised on vps OpenVPN, everything works, everything opens. But I don't know how exactly to force the server to redirect, for example from port 666, to port 80 of my machine that is connected to the vpn.

Answer 1

If your machine uses a VPN server as the default gateway, then the following iptables construction is suitable
: 80
iptables -t nat -A POSTROUTING -s internal_machine_address_inside_VPN/32 -p tcp -m tcp --sport 666 -j SNAT --to-source external_server_address_VPN:80

Answer 2

The easiest way is through rinetd - https://debian.pro/523