I am looking for a solution to my Active Directory problem.
Environment:
Attempting to authenticate users on an external Centos 6.4 website (outside our firewall) by connecting to Microsoft Active Directory which is located behind the firewall.
Currently, we use active directory within our firewall via the domain activedirectory.website.local and works fine. We are in the process of moving some of our sites to an externally hosted server so we need SSL. We have generated a self-signed ssl cert on the active directory server and have exported the ca.pem to the Centos server.
When I try to authenticate Active Directory through the terminal in the client Centos machine (located outside our firewall), I get an error:
TLS: hostname (firewall.website.com) does not match common name in
certificate (activedirectory.website.local)
This error occurs because:
I am trying to access active directory which is behind our firewall from a client computer from outside
the certificate says "Hey I'm generated from
activedirectory.website.local but you are asking for
firewall.website.com".
We talked to an SSL company about getting a commercial SSL for the .local server and they said they could sell us one for a year. Beyond that year they would not be able to extend the SSL due to some sort of regulation.
Due to the complexity of the network, I cannot change the domain name of activedirectory.website.local or firewall.website.com.
I'm sure someone has ran into this problem but I currently can't find any solutions on the web.
All I need from active directory is usernames and passwords for login authentication.
Thank you in advance!
First thing, (shitty ... caca boudin in french) can't you declare activedirectory.website.local with the right IP adress in /etc/hosts.
Another thing I see is to buy a certificate (or to create your own using your own CA) and install it on the Active-Directory service. Have a look to How to enable LDAP over SSL with a third-party certification authority.
Related
i have configured kerberos authentication when accessing to file server.
there is no need for logging in when i map drive and acccess to the file server
Just a curious question, if i can add additional server name to be used for authentication
for example.
currently my file server name is server01
when i map network drive through server01 / IP address, there is no issue.
when i tried to access through a server name server02, then i get an error in mapping the drive.
is there any way i can do this by allowing multiple server name to be allowed for kerberos authentication ?
thanks in advance for any advise
You can map as many file shares as possible you want with Kerberos authentication on a Windows domain joined system if the file servers hosting the file shares are joined to the same domain as the client Windows system accessing them.
Thus, you may have multiple file servers in your domain environment but they all should be joined to the AD domain for the Kerberos authentication to work successfully and let the users accessing and mapping the file shares authenticate through it as Kerberos needs a KDC (Key Distribution Center) due to which Active Directory authentication is required.
Please find the below dependencies for Kerberos authentication to work successfully: -
Operating System --> Later then Windows 2000 for client and Windows 2003
TCP/IP Network Connectivity --> Should exist between DC, client, and the target server
Domain System --> DNS must be functioning and accessible for the client
Active Directory Domain --> Necessary to use Kerberos authentication
Time Service --> Time source should be same and synchronized on all the network computers
Service Principal Names --> Kerberos authentication needs to have an SPN set for it so that clients can identify the service on the network
Also, refer this document for more details.
I am creating a simple client to connect to the LDAP servers running on one of my windows 2008R2 Active Directory Domain Controllers.
I have successfully connected to the LDAP server over a non TLS connection. However, whenever I attempt to make a TLS connection, the handshake fails. After some digging, and downloading the certificate using the following command:
openssl s_client -connect <domain controller>:636
I found that the certificate being served from the LDAP server is invalid. I can see that the certificate is signed by our CA and my local system, that runs the application already has this trust established with the CA. However, It is missing all of the subject information in the certificate. The client application does not allow for this.
After speaking with the administrator, he indicated that the certificates being generated for the domain controller systems to serve TLS certificates over LDAP is automatic and is created by our internal Microsoft Certificate Server. He was not sure how to address this.
After numerous Google searches, I have come up pretty empty on how to resolve this. Is it something that is addressed on the certificate server? Is it something on the domain controller which is stripping the subject information? Is it some setting or configuration? Since, I do not have direct access to these systems I am at a loss on where to begin.
Any assistance would be appreciated.
Blindly trusting a certificate that is invalid is not an acceptable solution.
Ask your admin to export the root certificate for your environment (like, to a .cer file). Then you can use that file to add it as a trusted root certificate on the computer that needs to access it.
That's how we do it in our environment when we've needed to access an external domain over LDAPS.
Of course, that only works if the application accessing LDAPS uses the Windows certificate store. Some applications, like Java-based apps, don't, and you need to do it another way.
I was able to assist my Admin with updating the template the certificate server was using to include the subject and subject alternate name.
I found the following articles that helped determine the problem
https://blogs.msdn.microsoft.com/microsoftrservertigerteam/2017/04/10/step-by-step-guide-to-setup-ldaps-on-windows-server/
https://social.technet.microsoft.com/wiki/contents/articles/2980.ldap-over-ssl-ldaps-certificate.aspx
https://support.microsoft.com/en-us/help/931351/how-to-add-a-subject-alternative-name-to-a-secure-ldap-certificate
Ultimately going over each setting until we found the right solution that solved the problem of why the certificate server was sending and invalid certificate.
I'm trying to authenticate my users created in Active Directory through FreeRADIUS server but I get an Access-Reject and the debug shows the following:
bind to imendab.com:389 failed : can't contact LDAP server.
What should I do to fix this?
Looks like a network level issue rather than a problem with FreeRADIUS.
Make sure your LDAP server is running and listening on TCP port 389 (not just LDAPS on port 636). Make sure it is not firewalled. Check what's happening with tcpdump or similar packet trace, and try command-line LDAP tools on the RADIUS server to make sure that they can do a successful look up.
Note that usually to authenticate users against Active Directory you need to install Samba on the FreeRADIUS server and join it to the domain. You can't get password hashes out of AD over LDAP. The only exception is if you are using some kind of PAP method (e.g. plain PAP or EAP-TTLS/PAP).
Active Directory Federation Service has been installed on Windows Server 2012 along with Active Directory.
When I try to execute https:/{server-name}/federationmetadata/2007-06/federationmetadata.xml or https:/{server-name}/adfs/ls/idpinitiatedsignon.htm my internet explorer shows me host not resolvable.
I can ping the DNS server and the service seems to be running fine. No Certification errors exist. I can see entry of /adfs/ls in ADFS console endpoint tab.
What could be the reason for getting a host not resolvable error? And how can I go about fixing this issue?
I resolved the issue. I needed to disable proxy in the network options.
I'm trying to install the preview of Azure AD Connect:
https://connect.microsoft.com/site1164/program8612
During the setup, you can configure the sign-in method for users, synchronization or a federation with ADFS. I want to use ADFS, and I want the setup to configure a new ADFS farm. The setup wants a SSL certificate, so I've made a self-signed certificate and exported it as a .PFX file. However, the setup won't accept the certificate, it states "The certificate is invalid or corrupted. Please try another certificate"
I selected another certificate which I've used for a website, and I get the same result. The certificate chain is OK, I've tried to install the certificate, but no matter what, the setup keeps rejecting the certificate. I can't find any further info in the eventlog or setup log file, and since the Azure AD connect software is quite new and still in preview, there's not much info on the web regarding the installation.
Any ideas on how to make this work?
It is mandatory for AD FS to use a third-party signed certificate. If you don't want to pay for a certificate, you can use one from wosign which is free and publicly trusted (as an intermediate certification authority from VeriSign or similar I think).