Am i out of luck or is there an option to specify that only a single path/endpoint should require client certificate ?
The scenario:
IdentityServer4 gives our users the option to sign in multiple ways (Username/Password, Azure AD or ClientCertificate)
The first two are working as intended, but the certificate paths does not prompt the user for his/her certificate, i know its possible with IIS but we want to run this using Kestrel.
If i setup the projects kestrel setting to require cert all endpoints requires it, this ruins the user experience when signing in with username/password og azure ad.
Are there any options for setting only out localhost/certificate path to require certificate and then in turn prompt the user to provide their cert when being redirected to that paths endpoints if there is no cert present in the request?
Resolved it by setting up two hosts, and capturing the request in the certificate challange endpoint and checking the connection, if there's no certificate present AND the connection is using the non-requirecert connection i redirected the context to the right connection and was then prompted to supply the cert and login works as intended.
Related
I've generated a self-signed certificate with Open SSL to use in a application that runs on IIS which authenticates users via Integrated Windows Authentication method.
However there is a limiting factor that is impacting the auth method that is the lack of DNS.
When there is no WAN the LAN lacks the ability to resolve hostnames and the clients cannot connect to the server without using direct IP or by registering the alias in the hosts file.
Chrome does not allow to use the Integrated Windows Auth method and shows a pop-up to authenticate the user. However not having the connection to the WAN makes the pop-up to keep being shown and never really authenticates the user.
Accessing the application in the own server allows the auth method to work when the domain is added to the hostname in the URL. However this only works for the server itself and not for the other computers in the network.
In the certificate I added the CN as the private IP of the server and also added it at the SAN, but it did not work. Chrome keeps showing the pop-up. Also added the certificate in client's machine in the Trusted Root Certificates.
In this scenario is it possible to make Chrome to recognize the certificate and allow this auth method to work or this won't work at all?
I am trying to setup IIS Client Certificate Mapping Authentication and so far I have been unsuccessful.
I have a valid client authentication certificate
I disabled all authentication methods in the Authentication feature of IIS for the target website
Using the configuration editor I setup iisClientCertificateMappingAuthentication as documented in various sources. In this series of screen we map a domain account to a certificate. This is done by exporting the certificate to a text file, removing the first and last line and making sure all is in one line.
The problem is as follows:
When I try browsing to a test page, browser correctly prompts for selection of a certificate. I select the correct certificate. I then get presented with
HTTP Error 401.2 - Unauthorized
You are not authorized to view this page due to invalid authentication headers.
If I enable Anonymous Authentication then it works, but the user is not the one in the mapping it is the user running the browser. I know this because the test page contains the following:
response.write (request.servervariables("LOGON_USER"))
response.write (request.servervariables("AUTH_USER"))
So the questions are:
For IIS Client Certificate Mapping Authentication, is this the only authentication feature that needs to be enabled?
Do we need to use the Authorisation feature to limit the users to the one provided in the mapping?
What I am trying to achieve is that only clients that have the certificate will be able to access the service.
What am I missing?
Cheers
Jose
I am trying to resolve a problem whereby trying to set a users password over LDAP is failing because of an access denied error - even though I am authenticating against the AD with an admin user.
An answer found in stackoverflow says that either I have to run the IIS user as the admin user (which does work) or i should connect to LDAP via SSL.
I cant go with the first option because I am using Elastic Beanstalk which will create and terminate instances so i cant change/set the user that IIS will be running as. So I am trying to use the LDAP over SSL idea.
My question is does that still require that the client itself also have a certificate installed in order to establish trust with the Domain controller? Or does this work just by installing a cert on the Domain controller and allowing the connection over SSL?
If it requires a certificate on the client then I have the same problem as i cant install anything on the client server other than the deployed app since Beanstalk is going to recereate and terminate that instance at will.
So does LDAPS require a cert on the client?
Is there a better way to solve my problem given the infrastructure i am using?
So does LDAPS require a cert on the client?
no, LDAPS do not require client certificate. Domain controller certificate is sufficient to utilize LDAPS. More details about LDAPS and certificate requirement: LDAP over SSL (LDAPS) Certificate
trying to set a users password over LDAP is failing because of an access denied error
there might be over9000 reasons why you receive this message. You need to check whether you are successfully authenticated on DC, if yes, check whether you have permissions and privileges (especially, if UAC is enabled). I would set up audit policies (on failed user password changes) and check Security eventlog to figure out what is going wrong.
No.
For openldap, I achieved this by adding this line to ldap.conf. But be aware of that, when you do that, your connections will be open to attacks like man-in-the-middle or any other.
TLS_REQCERT never
This is what I found using trial and error approach:
Actually, LDAPS server always asks for client certificate. You can verify that by turning on SCHANNEL log and observing the following message:
If there is no client authentication certificate than LDAPS connection still succeeds, i.e. no client authentication certificate is required indeed. But if you have some invalid client authentication certificate (in my case it was an expired cert installed long ago by a third party app) the connection will fail w/o any error or warning in SCHANNEL log on the client side. It took me a while to figure this out.
Yes of corse your client need a certificate to allow ladps communication betwen
him and de server.
According to
windowsitpro.com:
As an option, you can use LDAPS for client authentication -- but doing so requires that you also install a client authentication certificate on each of your clients."
Scenario: We have a server located in a Windows Active Directory domain which implements a web service API, implemented with WCF and exposed via IIS 8 over HTTPS. The clients making requests to the web service are not located in the domain. However, they should be mapped to AD users via SSL client certificates. I.e., when making a HTTP request, they include a client certificate, and I want that certificate to be mapped to the corresponding AD user.
I know that IIS supports two ways of client certificate authentication, IIS Client Certificate Authentication and Client Certificate Authentication using Active Directory. I'd really like to use the AD approach in our scenario, as it makes the management of client certificates easier (we can map certificates to users in the AD rather than in the IIS configuration).
However, the docs linked above say that,
[Client Certificate Authentication using Active Directory] requires that the IIS 7 server and the client computer are members of an Active Directory domain [...]
This indicates that we cannot use this approach, since our client computers are not part of the AD domain. However, this doesn't really make sense to me. How would the server even know whether the client making an HTTPS request is in the same domain?
So, here's the question: Can we use Client Certificate Authentication using Active Directory with clients outside the AD domain or not?
We've now had the chance to implement and test our solution with a machine outside of the AD domain. Indeed, it works - the client computer does not have to be part of the domain, the documentation seems to be wrong here.
I need to make something like ssl certificate authentication at website. As far as I understand my task I need to get user's ssl certificate and send it to server what will decide can user be authenticated or not.
How can I get user's SSL by javascript and send it to server? Is it possible at all? Or maybe my approach is wrong or I do not understand my task correctly.
Maybe my solution will be useful for somebody. At IIS server configuration we need to check require users certificates checkbox. Than user when opens site will be asked for a certificate form personal certificates storage.
After if public certificate can be accessed from a Request object (c#) at server. From it we can get user's details and allow or deny login