Interesting use of Ncat SOCKS proxy support

[David Fifield <david () bamsoftware com>]

This blog post by Hamy is about running ssh inside an obfuscating tunnel:
https://hamy.io/post/000e/how-to-hide-obfuscate-ssh-traffic-using-obfs4/

I thought it was interesting that it advises to use Ncat rather than nc,
because Ncat supports client authentication for SOCKS proxies. In this
case, it's not really using authentication; rather the SOCKS username
and password are being used to provide per-connection arguments to the
proxy.

        openssh-client, supports SOCKS proxy via ProxyCommand option.

        Unfortunately, nc is not good enough for the job as
        netcat-openbsd still doesn’t support authentication for SOCKS
        proxies.

        So we’re going to use ncat instead (part of the nmap package):
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