How to transfer proxy clients to another network interface?

Question

proxy

I welcome everyone. There was here such task It is
necessary to make an external SOCKS5 proxy with authorization. On what, it doesn't matter.
The task is approximately as follows:
1 network interface - static address
2 network interface - dynamic address It is
necessary to make sure that people connected to the proxy server through interface 1 get access to the Internet from interface 2.
Tell me how to implement or poke where to read on this topic.
Unix, Windows, doesn't matter.

Answer 1

3proxy