Notes on installing antinat 0.64:

This product requires GNU make.  If you don't have GNU make, we recommend you
obtain it before attempting to install antinat.

Notes on IPv6:
IPv6 is still highly experimental and not tested well, if at all.  I am
releasing it early in order to gain feedback about it, including
architectural problems.  On many architectures, it may be necessary to
compile --without-ipv6 for the time being.  Sometimes the compilation will
succeed, but problems will occur later.

Note that IPv6 support is not compiled by default.
