Searching for Proxy Support Session Based Authentication Ntlm information? Find all needed info by using official links provided below.
https://support.microsoft.com/en-us/help/2749007/an-unexpected-401-1-status-is-returned-when-using-pre-authentication-h
Aug 22, 2012 · An unexpected 401.1 status is returned when using Pre-Authentication Headers with Internet Explorer and Internet Information Services. Contenu fourni par Microsoft ... NTLM X-Powered-By: ASP.NET ... Wed, 22 Aug 2012 17:41:09 GMT Content-Length: 1293 Proxy-Support: Session-Based-Authentication. Notice that the initial request to the web ...
https://stackoverflow.com/questions/6189547/request-to-web-service-with-basic-authorization-via-proxy-with-ntlm-authorizatio
I got the app configuration working (WCF ServiceModel), it's using the default proxy credentials, the request is authenticating with the proxy, but after it authenticates with the web service it does not send the request body for some reason. The process works if I test locally without the NTLM proxy.
https://stackoverflow.com/questions/1443617/407-authentication-required-no-challenge-sent
Interestingly, the proxy server is not returning the HTTP Response header "Proxy-Support: Session-Based-Authentication". That header is absolutely required for use of NTLM/Negotiate for WWW-Authentication, and I wouldn't be terribly surprised to learn that .NET requires it for Proxy-Authentication. It should be pretty simple to test with Fiddler...
https://tools.ietf.org/html/rfc4559
If this is not honored, then the server can easily lose track of security context associations. A proxy that correctly honors client to server authentication integrity will supply the "Proxy-support: Session- Based-Authentication" HTTP header to the client in HTTP responses from the proxy.Cited by: 18
https://community.getpostman.com/t/ntlm-authentication-doesnt-work/1955
Jun 22, 2018 · I’m making a request in postman to an api that uses ntlm authentication, but postman gives up after it receives the initial 401. It never attempts to send any credentials to the server. ... Proxy-Support: Session-Based-Authentication {“Message”:“Authorization has been denied for this request.”}
https://bugzilla.mozilla.org/show_bug.cgi?id=602814
But bug 592197 says NTLM auth through a proxy works. It was broken for SSL temporarily, but that works too. So what's different between this reporter's config/network and the people who reported, worked on, and tested bug 592197?Not "blocking" 1.9.2 security updates if it's been a problem since the initial 3.6 release, obviously the scenario in which this bug shows up is somewhat rare.
https://answers.microsoft.com/en-us/msoffice/forum/all/not-able-to-connect-to-ewsexchangeasmx-when-ntlm/7946de64-3f4a-4b37-882e-51c805ab0c94
One of our customer has BlueCoat Proxy Server with NTLM authentication enabled. BlueCoat Proxy Server details: ProxySG S400-20 and SGOS 6.5.10.7 Our application fails to connect to EWS/Exchange.asmx when NTLM authentication is enabled in Proxy Server. Our application can connect to EWS/Exchange.asmx when authentication is disabled in Proxy Server.
https://forums.iis.net/t/1170562.aspx?IE+Proxy+won+t+use+NTLM+
Sep 02, 2010 · [Note to make this work required using an undocumented header in the response challenge, Proxy-Support: Session-Based-Authentication, that I observed ISA server using and Kerberos instead of NTLM. If I force NTLM, this fails] Then the URL requested is not local to the proxy server, the authentication process fails.
https://sharepoint.stackexchange.com/questions/5467/why-do-i-get-a-401-error-when-calling-a-wcf-service-from-a-web-part
The HTTP request is unauthorized with client authentication scheme 'Negotiate'. The authentication header received from the server was 'NTLM'. I configured Fiddler on the web application running the web part and found that both Kerberos and NTLM authentication headers are being returned:
https://github.com/caddyserver/caddy/issues/663
Mar 08, 2016 · Unlike Digest or Basic authentication where the authentication data is sent with each request, NTLM authentication authenticates the TCP connection. Once the connection is authenticated, future requests through that connection do not need to be authenticated (at least for a period of time).
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