This opens a proxy on your machine to `HOST` via `PORT`. 

ssh -NCD PORT USER@HOST

Now you can make `apt` work through `HOST`: 

Acquire::http::Proxy "socks5h://127.0.0.1:PORT";
Acquire::https::Proxy "socks5h://127.0.0.1:PORT";

Or `curl`: 

curl --socks5-hostname 127.0.0.1:PORT example.org

Or anything, really.