proxychains ng (new generation) - a preloader which hooks calls to sockets in dynamically linked programs and redirects it through one or more socks/http proxies. continuation of the unmaintained proxychains project. the sf.net page is currently not updated, use releases from github release page instead.
Since the local host resolves to ipv6 by default and the proxy host does not support the ipv6 network, the connection fails.