I'm using IIS7 with URLRewrite and Application Request Routing (ARR) as a reverse proxy. So I can point all requests from http://localhost/external to http://external/external
This is all working fine in my development set up. However on the client site they have a proxy between the web server and the internet (I'll refer to this as the middle proxy).
I've set up the proxy details for ARR, but the middle proxy requires authentification, so any requests are met with:
'http error', 407, 'Proxy Authentication Required'
I presume I need to grant the Application Pool user (of the site using URLRewrite/ARR) access to the internet on the middle proxy? Is this the best approach to take, and if so which account should be used? There don't seem to be any ARR options to add a username/password.
Note this was posted 2 years ago on ServerFault without response, I have now deleted the original which was at - https://serverfault.com/questions/289083/iis-and-reverse-proxy-with-authentification
Related
maybe someone can help me out.
I have a publicly accessible IIS Web Server (DMZ) with ARR enabled and use that IIS as a reverse proxy to rewrite all requests to an internal Website (QlikSense). So far so good. I sucessfully implemented keycloak as my Authentication module which is currently also installed on that external accessible DMZ server. Here comes my issue. Whenever I request the external URL, it sucessfully redirects me to my internal application (url rewrite) , and from there (over a redirect Uri) back to the keaycloak instance (which sits on the DMZ server) for authentication. Everything works fine but from an architectual point that setup is questoinable in my eyes. I would like the authentication to be happening internally and not on my DMZ server (behind the Reverse Proxy). But all my attempts to make keycloak authenticate on an internal installation failed so far (page cannot be opend because server not found). What do I miss to make external requests being rewritten to the internal keycloak server without getting the error that SAFARI CANNOT OPEN THE PAGE BECAUSE THE SERVER CANNOT BE FOUND ?
I would like to have the authentication part being handeld internally (behind reverse Proxy) and not externally, since port 8080 needs to be open on the DMZ which is a security issue...
thanks
I am running IIS and Node in parallel on a Windows Server. Is it possible to allow IIS intercept HTTPS requests, authentic them using Windows Authentication (Negotiate/NTLM), then proxy the requirements onto Node as HTTP requests with username and security groups in the header for Node to process?
As far as I know, it is possible to use windows authentication before proxy request. Windows authentication is to authenticate people through the local Windows network. There is no proxy server or even a proxy server. Protocol does not authenticate HTTP sessions, but authenticates the underlying TCP connection.
IIS can also proxy the request to Node, as long as the request is rewritten using ARR and URL rewrite.
However, IIS itself cannot obtain the user name and security group information, and requires the help of ASP.NET applications.
I'm currently working on a project with complex requirements and I do not feel comfortable with the solution I'm considering.
The main idea is to secure existing applications (which do not include security themselves) without modifying them. These applications are not accessible from outside and will be accessible only through a reverse proxy (OpenResty).
Users do not have access to all applications and the solution to identify users is Keycloak.
The main components are :
An angular portal : the entry point
A reverse proxy that redirect the user on the chosen application
The IAM : Keycloak
All the available application
this schema explain it
The idea is :
The user click sign in on Keycloak and gets back to the portal with an access token (JWT) that contains his roles (application he has access to)
The user click on an application on the portal and he is redirected to the targeted application through the reverse proxy
The reverse proxy check the validity of the token (exp, iss and the roles)
I know this is not a proper way to do some SSO between application, but the requirement here is that the application, that are not secured can't be edited bu have to be protect by an upfront system (the reverse-proxy here)
My question is : ok this will work for the first call, because the user have his JWT token on the portal and hits the application with it the first time, but after when the user will click on a link in this app.. there is no more token. This kind of architecture works well to protect REST API bu for a web application, sounds to me a little incertain.
Generally, you would have reverse proxy server to handle user authentication instead of login to keycloak first.
Flow will be like this:
User access portal.
Portal redirects user to application through reverse proxy.
The reverse proxy will first redirect user to keycloak for
authentication, and build a security session between browser and
reverse proxy server.
The reverse proxy forward request to your application
server.
For all subsequent requests, user always go through reverse proxy server.
Try to use github.com/gambol99/keycloak-proxy. It stores token in the cookie, which is better option for web apps.
!!! Warning: I guess any auth proxy can use only Authorization Code Flow, however Implicit Flow is recommended for Single-Page Application (Angular). It really depends what's your Angular app. Analyze sec. pros and cons first, to be secure.
I deployed multiple applications in tomcat-7.0.55 and used Central authentication service(CAS) for single sign-on. But when I am accessing an application and when it is getting redirected to CAS login page, I understood it was authenticated successfully and TGT and ST tickets were also generated.
But after the successful authentication, it is not getting redirected to the application page. I observed that the Proxy callback authentication is failed and the corresponding ticket is not generated. I could see this information in the catalina.out file.
For more information, my CAS authentication is running on http instead of https. Please let me know if this could create any problem.
And more over, all my apps are hosted on the 8080 port but the proxyCallbackUrl I gave is on 80 port. First of all my URL for the proxyCallbackURL is http://my_server_private_ip/webappcas2/proxyCallback (this was configured earlier to me) but I am not sure what URL is to be given as for the proxyCallbackUrl in the web.xml file of the application.
Thanks in advance.
Running CAS on a nonsecure port will not allow you to use single sign on. Furthermore, proxy callbacks are required to be https by default which is why you are seeing that error. Switch to https and all your problems will go away.
Have a IIS Reverse proxy redirect on specific request on WebSite with windows authentication and impersonation to another local site with win.auth + impersonation.
Reverse proxy and the web application placed on a different machines and iis versions (proxy- IIS 7.5 , webApp IIS6) and the same domain.
Requests through the reverse proxy does not allow the user to be authenticated on the remote server. has an infinite authentication request.
This is inherent to the way windows authentication (NTLM) works: the password is never sent, authentication is done with a salted hash of the password, so the first server can authenticate the user but cannot re-use those credentials to impersonate the same user on a remote server (since without the password it cannot authenticate).
Look at this blog post to get more information about this problem (which is known as "double-hop problem").