No, that's not possible, see http://www.phildev.net/ipf/IPFprob.html#8

Quoting Scott Ullrich <sullrich at gmail dot com>:

> Could this be accomplished with ipfw fwd ?  Perhaps a knob on the NAT
> section that has an option to enable nat bouncing for the ports in
> question and m0n0 simply creates a ipfw fwd rule in this case?
> 
> Scott
> 
> 
> On Wed, 27 Oct 2004 22:25:57 +0100, Tanuj <tanuj at ts86 dot net> wrote:
> > Dmitry Sorokin wrote:
> >
> > > Should it only bounce TCP or UDP as well? If UDP, then none of the bounce
> > > utilities support that for now.
> 
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