"by default" is what you compile in. look at -e flag for cpu, import, etc. there's sshsrv for dealing with none plan9 systems.

On Wed Jan 07 2015 at 8:49:46 PM Yuning Feng <fengyuning1984@gmail.com> wrote:
Questions:

1. Is communication between servers encrypted by default?
2. How about between plan9port and native plan9?
3. Assuming the previous questions have positive answers, which part
of the source shall I browse to convince myself?

Thanks!

yuning