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Questions tagged [negotiate]

The Negotiate HTTP authentication scheme is defined in RFC 4559.

If a server receives a request for a protected resource it responds with status 401 Unauthorized and a WWW-Authenticate: Negotiate header. The client reissues the original request with a WWW-Authenticate: Negotiate [gssapi-data] header. The server uses the gssapi-data to attempt to authenticate the client; if successful the request continues and a 2xx response can also carry a WWW-Authenticate response header containing the final leg of an authentication.

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WCFTestClient The HTTP request is unauthorized with client authentication scheme 'Anonymous'

I've created one WCF service and deployed it on Server. When I browse this service it gives me positive response with ?wsdl URL. Now I'm trying to test the service through WCF Test client. It shows proper metadata. But when I try to invoke any of…
user82613
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How to find if NTLM or Kerberos is used from WWW-Authenticate: Negotiate header

I am programming a client application in .Net that communicates with server via HTTP. I need to set different request buffering options in case of NTLM and Kerberos authorization. How to find out if NTLM or Kerberos is used? Is it possible to…
IT Hit WebDAV
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How do people make Java SPNEGO client work in Windows?

In order to do client-side HTTP SPNEGO authentication with Java on Windows you need to set the Windows Registry key allowtgtsessionkey. This is well documented. What I do not understand is how people get around this? Most corporate sites would…
peterh
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Windows Executable File Authentication

Searching around the windows authentication methods and protocols, i decided to understand the exact difference between Negotiate, Kerberos, and NTLM used in a simple executable file before liking it with IIS and Web Authentication. I reached to…
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Client sometimes negotiates NTLM after Kerberos has been enabled, until client server rebooted. How to avoid the reboot?

Some context about the setup: We're switching from NTLM to Kerberos (Negotiate) for service-to-service authentication between various .NET workloads (e.g. IIS-hosted web API, or simple .NET command line program). For any call from client to server,…
valorl
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How to fallback from Negotiate method to Basic only when Negotiate fails

I have a webapplication which does the kerberos and basic authentication as well. I do not know what the client is capable of. So both auth mechanisms are sent in 401 reply. The reply header will contain, WWW-Authenticate:…
kalyan
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Can I indicate to clients that SPNEGO is supported but NTLM is not for HTTP requests?

The two WWW-Authenticate additions Microsoft makes use of that I am currently aware of are NTLM Negotiate If Negotiate is sent down from the server, based on a set of conditions Kerberos will be used Intranet Zone Accessing the server using a…
Scott Markwell
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MS IE & Edge fall back to http/1.1 after Kerberos Negotiate via http/2

We recently updated our Apache (v 2.4.33) Reverse Proxy to use http/2 MS IE (v 11.431.16299.0) and MS Edge (v 41.16299.402.0) on Win 10E 1709 seem to fall back to http/1.1 after the first request. Both browsers sticks then to http/1.1 and do not…
themenace
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How to get NegotiateStream to use Kerberos?

After asking this question, I've been trying to use NegotiateStream to authenticate a Windows client against a Java server. It seems that Java doesn't have great NTLM library support, so I've been working on the assumption that I'd have to use…
Luke Halliwell
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Kerberos authorization doesn't work on Chrome and FireFox, but works on IE

I follow this guide to integrate cas with Windows AD. It works fine on every browser few days ago. But not it only works on IE, when I use firefox browser only send "Negotiate TlRMTVNTUAABAAAAl4II4gAAAAAAAAAAAAAAAAAAAAAGAbEdAAAADw==" to server, then…
zhufeizzz
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SSH Negotiation: Bad SSH2_MSG_KEX_DH_GEX_REPLY or something else?

I am doing unix server ssh emulation for iOS. In the process of negotiation I met many of the hurdles and still fighting with those. One of the latest is about the SSH2_MSG_KEX_DH_GEX_REPLY packet data, where I receive the wrong packet length (may…
Revinder
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GSSAPI for NTLM authentication

Is it possible to use GSSAPI for NTLM v1/v2 authentication? I am trying to build a web-server, quite like squid / apache, but I would like to authenticate clients that could be using IE / FireFox, using NTLM / Negotiate protocols. I tried using…
mdk
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C# HTTPWebRequest against Negotiate/Basic with Realm Site

sorry for doing another question about this topic but i've been reading and can't really make it work... Getting to the point... I've a link that will download a zip file. I've been given access to this website (my user) and now i'm trying to code a…
FEST
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HTTP Authentication type Negotiate in iOS client application

Is the "Negotiate" HTTP Authentication scheme supported in iOS apps? I'm trying to access a server that uses this authentication scheme. I'm currently using the ASIHTTPRequest class, which internally uses the CFNetwork library. Authentication fails…
Steve
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The HTTP request is unauthorized with client authentication scheme 'Negotiate'

I already spent so much time trying to figure out what the problem is. I am getting this error when consuming WCF service from a desktop console application. The service works fine when access from a browser with silverlight client. Error…
Ross Brigoli
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