OCI: Unable to SSH to Ubuntu Instance Using Password

APPLIES TO

Oracle Cloud Infrastructure - Version N/A and later
Linux OS – Ubuntu 22.04

SYMPTOMS:

Unable to ssh to the instance with password even after setting PasswordAuthentication to yes in the sshd configuration file /etc/ssh/sshd_config.

CAUSE:

Incorrect ssh configuration. The configuration file under /etc/ssh/sshd_config.d/ is having PasswordAuthentication set to no.

$ sudo cat /etc/ssh/sshd_config.d/disable_password.conf | grep PasswordAuthentication

PasswordAuthentication no

SOLUTION:

1. Remove or comment the PasswordAuthentication no from the configuration file under /etc/ssh/sshd_config.d/.
2. Make sure PasswordAuthentication yes is set in /etc/ssh/sshd_config.
3. Restart the