Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium


RHEL and Ldap authentication

Posted on 2011-09-08
Medium Priority
Last Modified: 2012-05-12
I have configured my RHEL server to authenticate to AD 2008.  wbinfo -u and finger username all work fine, no errors in joining domain, but when I try to ssh it fails.  The only think i see that could possibly be of use is in the /var/log/secure, stating:

 error: Could not get shadow information for USERNAME

Any ideas?
Question by:Elemental12
  • 5
  • 3

Expert Comment

ID: 36504676
try running pwck and make sure the login shell and home directory exist
LVL 10

Expert Comment

ID: 36504760
shadow information is the password, I guess.

Author Comment

ID: 36505011
I ran pwck, and it said pwck: no changes.  I am not sure what your shadow information comment means abbright.
Get quick recovery of individual SharePoint items

Free tool – Veeam Explorer for Microsoft SharePoint, enables fast, easy restores of SharePoint sites, documents, libraries and lists — all with no agents to manage and no additional licenses to buy.

LVL 10

Expert Comment

ID: 36508772
I mean that while your configuration allows for the retrieval of user data it seems not to work for the password information in AD. As Active Directory does not provide clear text password you may need to configure the authentication mechanism separately (PAM, Kerberos, ...).

Author Comment

ID: 36510190
How do I configure that ?

Also, if I do USERNAME@DOMAIN.COM, I can authenticate just fine.  Also, wbinfo -u works just fine, as well as id USERNAME.  So I can definitely auth and read from AD.  Almost seems like ssh is the one with the issue ?
LVL 10

Expert Comment

ID: 36510215
Ok, this looks like the authentication-packages does not know / use the information about the domain.
Maybe the option "winbind use default domain = yes" helps (see http://www.ccs.neu.edu/home/battista/articles/winbind/winbind.html).

Author Comment

ID: 36510250
  workgroup = DOMAIN
   password server = DC1.DOMAIN.COM DC2.DOMAIN.COM
   realm = DOMAIN.COM
   security = ads
   idmap uid = 10000000-4000000000
   idmap gid = 10000000-4000000000
   template shell = /bin/bash
   winbind use default domain = true
   winbind offline logon = true

This is part of my smb.conf file.

Accepted Solution

Elemental12 earned 0 total points
ID: 36510727
Fixed it.  In the sshd_config, the UsePam was set to no for some reason.  Set it to yes and then service sshd restart, and it is working.


Author Closing Comment

ID: 36534679
problem was in the sshd_config.

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In part one, we reviewed the prerequisites required for installing SQL Server vNext. In this part we will explore how to install Microsoft's SQL Server on Ubuntu 16.04.
Often times it's very very easy to extend a volume on a Linux instance in AWS, but impossible to shrink it. I wanted to contribute to the experts-exchange community a way of providing a procedure that works on an AWS instance. It can also be used on…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
How to Install VMware Tools in Red Hat Enterprise Linux 6.4 (RHEL 6.4) Step-by-Step Tutorial
Suggested Courses
Course of the Month14 days, 21 hours left to enroll

578 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question