Hi ! I've got strange issue recently, not sure after what it happens, either to 3.1.13 or latest updates of Debian Stretch. non-root ssh users immediately disconnected. I suspect this could be somehow related to jailkit but I'm not sure. Root user can connect just fine. tail -n 10000 auth.log | grep client_ssh_login Aug 28 18:46:35 mail sshd: Accepted password for client_ssh_login from ip1.xx.xx.xx port yyy ssh2 Aug 28 18:46:35 mail sshd: pam_unix(sshd:session): session opened for user client_ssh_login by (uid=0) Aug 28 18:46:35 mail sshd: pam_unix(sshd:session): session closed for user client_ssh_login This is really strange. Especially taking into account that port yyy every time is different, and is in 4xxxxx range which I don't use at all. Server is in DMZ zone after router/firewall. All other services running fine. What could be the problem? Thanks in advance.