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A Cloud Guru

Identify and Fix LDAP and Kerberos Identity Management Issues

In this exercise, you will troubleshoot and resolve authentication issues with both LDAP and Kerberos. *This course is not approved or sponsored by Red Hat.*

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Path Info

Level

Advanced

Duration

1h 30m

Published

Apr 04, 2019

Challenge

Verify LDAP and Kerberos logins on Server1.
On Server1 (10.0.1.10)

Attempt to SSH in as testuser01 and receive a Kerberos ticket:
```
ssh testuser01@localhost
```
```
kinit
```
LDAP seems functional, but Kerberos is broken. View the Kerberos config:
```
cat /etc/krb5.conf
```
Modify /etc/krb5.conf:
```
vim /etc/krb5.conf
```
Change EXAMPLE_COM to EXAMPLE.COM.

Use authconfig to enable Kerberos logins:
```
authconfig-tui
```
SSH in as testuser01 and receive a Kerberos ticket:
```
ssh testuser01@localhost
```
```
kinit
```
```
klist
```
Challenge

Verify LDAP and Kerberos logins on Server2.
On Server2 (10.0.1.11)

Attempt to SSH in as testuser01:
```
ssh testuser01@localhost
```
Use getent to retrieve account information about testuser01:
```
getent passwd testuser01
```
Verify LDAP and Kerberos logins are enabled:
```
cat /etc/sysconfig/authconfig
```
User authconfig-tui to modify LDAP settings:
```
authconfig-tui
```
Use getent to retrieve account information about testuser01:
```
getent passwd testuser01
```
SSH in as testuser01 and receive a Kerberos ticket:
```
ssh testuser01@localhost
```
```
kinit
```
```
klist
```

Author

A Cloud Guru

The Cloud Content team comprises subject matter experts hyper focused on services offered by the leading cloud vendors (AWS, GCP, and Azure), as well as cloud-related technologies such as Linux and DevOps. The team is thrilled to share their knowledge to help you build modern tech solutions from the ground up, secure and optimize your environments, and so much more!

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