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).
Related
I have SSRS running on my Azure VM, I want to access my SSRS Server Portal through my DNS name with an https. I already deploy add configure my https using a certificate that I already generate using let's encrypt and a different port. FYI this certificate is used by my Website too. But when I try to access my SSRS using an https and my DNS name, but it won't connect, its return site can't be reached. I already add inbound rules to my port too. But when I try to connect from my Ip and Http It will connect. What did I miss?
I found the answer, I need to add my Inbound port in my azure Network Security Group
As the title says, if the IIS web server running on active directory domain 'domain_A' can authenticate an user (windows authentication) from a domain 'domain_B' does it mean that 'domain_A' can use LDAP to query 'domain_B' ?
As an additional note, I pinged the 'domain_B' ldap on port 389 and it doesn't aswer.
Thanks
It is possible, but not the only approach that would yield the same results. The server in domain_A could have something like
<add name="ADConnectionString" connectionString="LDAP://domaincontroller.domain_B.gTLD/DC=domain_B,DC=gTLD" />
to perform authentication against domain_B using LDAP. The connectivity would be from the server in domain_A, so unless you're sourcing the connection attempt from that server ... port 389 (clear text ldap) or 636 (ssl ldap) being closed is not indicative of anything.
But it's also possible the two domains are part of the same forest or a trust has been established between the domains. The web servers could be set up to use basic authentication. You'd need to look at the IIS config on the server in domain_A to be certain.
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 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.
Our environment looks like this:
we've got a forest of ActiveDirectory servers that trust each other.
we've got a Linux Apache with mod_auth_kerb that authenticates against the "main" AD server.
For some combinations of clients & domains, we get the following error message:
krb5_get_init_creds_password() failed: KRB5 error code 68
Googling says this error:
is being returned by Active Directory because your users are
attempting to obtain a Kerberos TGT for a realm that
is not hosted on the server to which they are authenticating.
Is there a way to work around this?
You missed to add all necessary Realms/KDCs into your krb5.conf. GSSAPI cannot obtain a ticket for an unknown realm.
The above examplee works perfectly with gssapi in our forest env.
To ease the configuration work, you may configure your krb5.conf to query DNS to lookup the KDCs. This is what Windows does.