Hello there! I'm trying to backing up my VMs, containers (linked for some) and templates from my current server which is going to be replaced by a better one. I had problem before trying to create a cluster and add a node (because of the hostname that are the same on the two machines) and found pve-zsync is an elegant solution for this (as well for redundant backup solution). The problem I face is: root@noxen:~# pve-zsync sync --source 100 --dest xxx.xxx.xxx.xxx:rpool --verbose full send of rpool/basevol-100-disk-1@rep_default_2018-12-07_14:56:41 estimated size is 1.11G total estimated size is 1.11G TIME SENT SNAPSHOT COMMAND: zfs send -v -- rpool/basevol-100-disk-1@rep_default_2018-12-07_14:56:41 | ssh -o 'BatchMode=yes' firstname.lastname@example.org -- zfs recv -F -- rpool/basevol-100-disk-1 GET ERROR: Host key verification failed. Browsing few posts on forums, anything I tried was with no luck. Things I tried are: - pvecm updatecerts and restart pveproxy service on both servers - ssh -o 'HostKeyAlias=<Target node Name>' root@<Target node IP> on both servers - delete /root/.ssh/know_hosts on both server Nothing worked, still stuck with same error. Can you help me to sort this out ? Thanks anyway.