We have an application which is hosted on the on-premises Windows server (IIS) server
now I created a windows server on azure and building a web app for it.where the application needs to authenticate the user by windows server (DC) using kerbrose protocol but I couldn't find any documentation regarding this from Microsoft's side
Is the above query possible to be implemented in the azure web app?
No, it's not possible. Windows Authentication is something for on-premise deployments. For Azure Web Sites Azure Active Directory is clearly the best option. Sync from AD to Azure Active Directory is also quite easy to setup.
If you still want to absolutely use Windows Auth and host your website on Azure, you can create Windows VM and host your website there. You then need to join the VM to your AD. To this, both VMs must be in the same network. So if your VM is on-premise you will need to create an site-to-site VPN.
For more information, follow this SO which also discussed about this.
If your intention is to join the VM hosting the website to a domain then as others have mentioned, this isn't possible.
However, doing Kerberos authentication itself within an Azure website isn't particularly difficult, but it does require manual implementation. Windows natively handles all of this for you on domain joined machines and and IIS exposes that functionality. Since you can't domain join you have to manually do all that heavy lifting and request and validate the tickets yourself.
This involves creating a service account in Active Directory and keeping the account password in sync. Once you have that you need to indicate to the browser that it needs to negotiate auth, which is done with the WWW-Authenticate: negotiate header on a 401 response. The client, if configured to send tickets, will send a ticket in the Authorization: Negotiate YII... request header on a subsequent response. At this point you need to shove that negotiate header and that original service account password into something that can validate Kerberos tickets. Windows SSPI will do this for you, but it's a pain. I built a library that'll do this for you: Kerberos.NET. YMMV with what works best for you.
All of that said, it may be more beneficial to switch over to a more modern authentication mechanism like OAuth/OpenIDConnect/SAML.
There are several ways depending on if you have to allow access to users who are associated with a on-premise Active Directory or not.
You should have a look at this service: https://learn.microsoft.com/en-us/azure/active-directory-domain-services/
It will offer an Active Directory within Azure where you can domain join your VM to and then using Kerberos as authentication protocol (should work the same way like on prem).
The other option would be to create a new Active Directory within your Virtual Network (via 1 or 2 small Windows Server VMs where you create the AD).
The good thing if you are using Active Directory Domain Services would be that you could extend it to your on-prem Active Directory by synchronizing or federating your on-prem AD.
There are more informations regarding these scenarios here:
https://learn.microsoft.com/en-us/azure/active-directory/hybrid/whatis-hybrid-identity
For a Azure App Service - Web App you would connect it to your Azure Active Directory (AAD) and use the hybrid identity model to allow users who originate from an on-prem AD access to it:
https://learn.microsoft.com/en-us/azure/app-service/configure-authentication-provider-aad
Hope this helps a bit, it is a rather complicated topic you are digging into.
Related
I have a request to restrict the access (access control) to a small user community in GCP.
Let me explain the question.
This is the current set up:
A valid GCP Organization: MyOrganization.com (under which the GCP project is deployed / provisioned)
Cloud DNS (To configure domain names, A & TXT records, zones and subdomains to build the URL for the application).
Oauth client set up (tokens, authorized redirects URIs, etc.).
HTTPS load balancer (GKE -managed k8s service- with ingress service), SSL certificate and keys issued by a trusted CA.
The application was built using python + Django framework.
I have already deployed the application (GCP resources) and it is working smooth.
The thing is that, since we are working in GCP, all IAM users who has a valid userID#MyOrgnization.com can access the application (https://URL-for-my-Appl.com).
Now, I have a new request, which consists in restricting access (access control) to the application only for a small user community within that GCP organization.
For example, I need to ensure that only specific IAM users can access the application (https://URL-for-my-Appl.com), such as:
user1#MyOrganization.com
user2#MyOrganization.com
user3#MyOrganization.com
user4#MyOrganization.com
How could I do that, taking into account the info I sent earlier ?
thanks!
You can use Cloud IAP (Identity Aware Proxy) in order to do that.
Identity-Aware Proxy (IAP) lets you manage access to applications
running in App Engine standard environment, App Engine flexible
environment, Compute Engine, and GKE. IAP establishes a central
authorization layer for applications accessed by HTTPS, so you can
adopt an application-level access control model instead of using
network-level firewalls. When you turn on IAP, you must also use
signed headers or the App Engine standard environment Users API to
secure your app.
Note: you can configure it on your load balancer.
It's not clear in your question if your application uses google auth (but considering that you talk about org-restricted login I think so) - if that's the case you should be able to enable it without virtually touching anything in your application if you are using the Users API.
The best and easiest solution is to deploy IAP (Identity Aware Proxy) on your HTTPS Loadbalancer
Then, grant only the user that you want (or create a gsuite user group and grant it, it's often easier to manage)
Good morning everyone,
My apologies if this post is too similar to this post:
Dynamics 365 and Azure integration
but I am struggling to understand exactly what is needed in order to setup a web service on an Azure server that is consumable by a Dynamics 365 plugin. Based on my research it appears that it goes as follows but I would like to see if any knows of a better guide.
1.) Construct the web service as normal on the Azure Windows Server.
2.) Register a proper DNS Domain name (friendly-name) and route it to the Azure server.
3.) Secure that Azure server/URL with a certificate.
4.) Call the web service from my C# Dynamics 365 plugin.
Is that everything or might I be missing something critical? Thank you!
4 might be an issue, given you want to use certificate based security, not sure that will work, you might need to use another mechanism, e.g. basic user name and password. Otherwise looks okay.
Plug-in isolation, trusts, and statistics
Web access
Sandboxed plug-ins and custom workflow activities can access the
network through the HTTP and HTTPS protocols. This capability provides
support for accessing popular web resources like social sites, news
feeds, web services, and more. The following web access restrictions
apply to this sandbox capability.
Only the HTTP and HTTPS protocols are allowed.
Access to localhost (loopback) is not permitted.
IP addresses cannot be used. You must use a named web address that requires DNS name resolution.
Anonymous authentication is supported and recommended. There is no provision for prompting the logged on user for credentials or saving
those credentials.
I am to be having a lot of problems, misinformation and confusion when attempting to find out the plausibility and viability of attempting this.
The requirement is for a remote client, accessing our website to be auto signed in with their Active Directory User account.
We have the option to setup a WCF service (or something similar) on their remote server for authentication purposes. Which from my little understanding is how this problem will be tackled.
So, my question after a little background is this.
CAN this be done, and HOW can it be done?
Instead of hosting a WCF service on their domain, I would look into installing ADFS on their domain.
You can change your website to accept security tokens from ADFS using the WS-Federation protocol. You can use classes from the System.IdentityModel namespace for that. An example of how to implement this in ASP.NET can be found here.
An alternative would be to use Azure Active Directory as your identity provider and have your client sync accounts to their AAD directory (or federate between AAD and ADFS). An example can be found here.
I got a web DMZ server, that hosts an "Extranet" ASP.NET application. I want that users should authenticate to this application using the same user and password that they use on their Windows at work. (we are using Active Directory)
I want to know what the best way is -the most secure way - to connect from the DMZ web server to the Active Directory.
For now I saw two possibilities:
- RODC
- LDAP Over SSL (LDAPS)
Are there any other option you recommend? What other options should I consider? Any limitation, or potential problems with any of those solution?
It exist a Microsoft document talking about that :
Active Directory Domain Services in the Perimeter Network (Windows Server 2008)
You can also take inspiration from Microsoft consideration on installing an Exchange Front-end computer into a DMZ
Front-End and Back-End Server Topology Guide for Exchange Server 2003 and Exchange 2000 Server
I am migrating one ASP.NET MVC 3 intranet Website to the Windows Azure and DB to SQL Azure.
On Premises my site uses Windows Authentication to authenticate and authorize the user(By Placing AUTHORIZE attribute on controllers).
It would be very kind of you If you can let me know How to go about the same.Thank You In Advance !
You have two choices here:
Use federated authentication and something like ACSv2. This requires a bit of work to setup a relying party, install ADFS2, etc. However, it is the most robust and future proof option. It is a very good option.
Use something like Windows Azure Connect. That will bring Windows Authentication to the cloud by joining your running instances to your domain controller on-premises. In effect, you have something of a VPN between your cloud instances and your on-premises domain controller. There are some caveats to this model today (requires installing agent on DC for instance), but it would be from a 'just works' stand point, the easiest. Longer term, this is less attractive I believe than option #1.
You can get more details for each of these by checking out the Windows Azure Platform Training Kit.
I should also add that you have no option (today at least) of using Windows Authentication with SQL Azure. You must use SQL authentication there, so what I am talking about here only applies to the web site itself.
I'm very successfully using Windows Identity Foundation with Azure AppFabric Access Control Service to authenticate using ADFS v2.
As well as straight authentication, it gives you lots of flexibility over other claims, such as roles (which don't need to be based solely on AD group membership).
In my opinion, its biggest strength is that there is no communication channel required between the Azure platform and your on-premise AD. Everything is done via the browser. From a security perspective, this means that although anyone can reach your application, nobody can authenticate to it unless they can also reach your ADFS server. Access to this can be restricted to on-premise clients only or via VPN, greatly reducing the attack surface.
Also, because ADFS does not need to be exposed externally, it can greatly ease the bureaucratic overhead of deploying it, in my experience.
Only configuration is required, which although it can be a bit of a fiddle initially, is pretty straightforward once you've got to grips with it. You configure WIF to use ACS as it's Identity Provider and create a Relying Party in ACS for the application. Then, you configure ACS to use ADFS as its Identity Provider. You could configure WIF to talk directly to ADFS, but the additional level of abstraction of going via ACS can be useful.
Once you've done your configuration, using the [Authorize] attribute 'just works'.
Note that if you're using Ajax calls into your controllers, you'll need to take some precautions, as Ajax calls don't handle the federated authentication redirect (or the ADFS Shuffle, as I like to call it), but it's nothing that's insurmountable.
All in all, I'm very impressed with the combination of WIF+ACS+ADFS for transparent Windows integrated authentication.