My Oracle Support Banner

SSH Fails for Active Directory Domain Users with Error "User not known to the underlying authentication module" (Doc ID 2290549.1)

Last updated on AUGUST 04, 2018

Applies to:

Linux OS - Version Oracle Linux 7.3 with Unbreakable Enterprise Kerne [4.1.12] and later
Linux x86-64

Symptoms

Following errors are observed for Active Directory Domain users when trying to ssh.

login as: test1
test1@10.x.x.x's password:
Access denied

The /var/log/secure shows the following error.

Jul 26 20:42:00 adclient sshd[7988]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=dhcp-xxx user=test1
Jul 26 20:42:00 adclient sshd[7988]: pam_sss(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=dhcp-xxx user=test1
Jul 26 20:42:00 adclient sshd[7988]: pam_sss(sshd:auth): received for user test1: 10 (User not known to the underlying authentication module)

Cause

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.