All about Debian JP Admin
rsync mirror

push mirror
primary
create ssh key pair
identity	- secret
identity.pub	- public
mirror site (1)
primary's identity.pub put in ~/.ssh/authorized_keys
command="~/websync &" 1024 41 1095....159 archvsync@debian
~/websync execution only from archvsync@debian connection
websync - rsync pull mirror
websync.conf - configuration file