Migrating nethsever between cloud vps servers

It seems like hotsync is intended for internal use. The service stunnel opens port 273 to green on slave by default.
You may enable access in “Network services” in web UI or on command line but it’s not intended and signal-event nethserver-hotsync-update will reset it. VPN may be another solution.

config setprop stunnel access green,red
signal-event firewall-adjust

At slave promotion hotsync will restore the original IP which may make your VPS unreachable. Maybe simple rsync would be the better solution for VPS migration…

http://docs.nethserver.org/en/v7/migration.html#migration-with-rsync