[1] /n/sources/contrib/anothy/bin/rc/postroot
[2] /n/sources/contrib/anothy/bin/rc/tun

Thank you. That is really helps. I learned about srv(3) and now understand mine misconception.
I tested it all at work from NATed kvm and it all works. But I have problem when tried postroot from home network.

From home terminal(highthills) I cpu to work cpu server and run postroot on it. Then at work I login to
same cpu server from work terminal. Then:
cpu% 9fs /srv/rsalmin.highthills.postrot /n/rsalmin.highthills.postroot
cpu% cd /n/rsalmin.highthills.postroot
cpu% ls
ls: .: clone failed

What it may be? A connection lose?