Proxy automatic authentication not working with code 407 for McAfee Web Gateway

[Juliano]

I used to change Fiddler script to add the automatic authentication to make console based applications work with NTLM authentication, however my company has moved from TMG to McAfee Web Gateway and now the code below is not working. 

 

oSession["X-AutoAuth"] = "domain\user:mypass";

 

CONNECT www.telerik.com:443 HTTP/1.1
Host: www.telerik.com:443
User-Agent: Fiddler/4.6.2.32002 (.NET 4.6.2; WinNT 10.0.14393.0; en-US; 4xAMD64; Auto Update; Full Instance)
Proxy-Authorization: Negotiate TlRMTVNTUAABAAAAl4II4gAAAAAAAAAAAAAAAAAAAAAKADk4AAAADw==


HTTP/1.1 407 authenticationrequired
Via: 1.1 172.99.71.201 (McAfee Web Gateway 7.6.1.1.0.21006)
Date: Fri, 30 Sep 2016 18:11:09 GMT
Content-Type: text/html
Cache-Control: no-cache
Content-Length: 3007
Proxy-Connection: Keep-Alive
Proxy-Authenticate: NTLM
Proxy-Support: Session-Based-Authentication

Can you help me?

[Tsviatko Yovtchev]

Hi,

You can try oSession["X-AutoAuth"] = "default" or you could use the Automatically Authenticate menu entry in the rules menu. Does this change something?

Regards,
Tsviatko Yovtchev
Telerik by Progress

[Juliano]

I tried both with oSession["X-AutoAuth"] = "(default)" (which is the default code on Fiddler rules) and  oSession["X-AutoAuth"] = "MyPassword".For both cases, I receive http error 407.

[Mcafee]

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