Passing address family to proxy command

Jakub Jelen jjelen at
Mon Aug 3 23:48:23 AEST 2020

On Mon, 2020-08-03 at 23:00 +1000, Darren Tucker wrote:
> On Mon, 3 Aug 2020 at 22:09, Jakub Jelen <jjelen at> wrote:
> [...]
> > My suggestion would be to provide a new replacement percent-token
> > to
> > inform the proxy-command about the preferred address family, but if
> > you
> > can think about better solution, I would be glad to hear it.
> I think adding a percent-token for AddressFamily would be a
> reasonable
> solution and can't think of a better one offhand.

Thank you for the fast reply.

Looking into netcat, I would expect using directly -4 or -6 values as a
replacement for %f (family) would be probably the easiest as most
portable as it usually resembles to existing command-line switches for
many other tools.

I attached a simple patch to achieve this into the bugzilla and tested
in debug mode that it resolves as expected:

Jakub Jelen
Senior Software Engineer
Security Technologies
Red Hat, Inc.

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