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I am using squid proxy server to authenticate the client before passing on the request to public network. I haven't set HttpWebRequest.Proxy object so I am assuming that the web request will take the default window credentials and pass on to the proxy server.

I have added an entry of the user to squid proxy as well, but I am getting the following error while making the request.:

(407) Proxy Authentication Required.

In squid logs, I am getting this:

TCP_DENIED/407 3722 CONNECT

I have inserted the following block in App.config

<system.net>
    <defaultProxy useDefaultCredentials="true">
        <proxy
        usesystemdefault="true"/>
    </defaultProxy>
</system.net>

To verify if there is discrepancy between the user credentials registered with squid and my windows user credentials. I tried opening a public website through browser which prompted for credentials as the request was passing through proxy server ( which I have set under Internet Options ), after entering windows credentials I was able to access that site.

Also, i checked through Fiddler ( a tool to check network traffic ) that the request to that proxy server didn't have Proxy-Authorization Header.

Can anybody please check and tell if something I have missed or I have made any mistake.

cbinder
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  • I'm getting the same issue. The outgoing (CONNECT) HTTP request does not contain a Proxy-Authentication header at all (although it does have a Proxy-Connection: Keep-Alive header). Did you find a solution to this? – James Bateson Dec 01 '16 at 16:56
  • @JamesBateson Unfortunately, I didn't. If you find any solution to this please do post because in our software release we have mentioned this functionality as 'not available' :( – cbinder Dec 02 '16 at 05:47

0 Answers0