Server is Ubuntu v20. ISPConfig is v3.2.2, soon 3.2.8. I created a Shell-User via ISPConfig. I added my SSH-RSA Public Key (for key-based logins). My private key is used for SSH to user ubuntu. It always works. I tried to SSH/SFTP with Filezilla and it reports the dreaded "Server refused our key". The debug trace in Filezilla shows a good connection, it found my .ppk and successfully loaded a key pair. It then offers the public key which is refused. I set sshd for DEBUG3 logging. It can't access site00/subdomain/home/user/.ssh/authorized_keys. As configured in the Options tab, the log shows the SSHD is temporarily using the web00 user to access the file and is getting a basic "permission denied". It turns out the "home" folder there is created with ownership root:root. When changed to web00:client00, and the tree is given owner read access, then the connection is successful. Bug or feature? Thanks!