Correct Settings for Proxy

Question

I am trying to submit an HTTP request but I am behind a proxy. I am trying to auto configure the proxy as you see in the code below but I get a 404 not found as a response. I am guessing something about the proxy configuration is not correct. Any ideas?

WebProxy proxy = new WebProxy("http://companyproxy.com/proxy.pac");   
proxy.UseDefaultCredentials = true;  
WebRequest request = WebRequest.Create
("http://weather.noaa.gov/pub/data/observations/metar/stations/LGSO.TXT");
request.Proxy = proxy;
request.Credentials = CredentialCache.DefaultCredentials;
WebResponse response = request.GetResponse();
response.Close();

I have tried using default credentials for the proxy as well as my own network credentials but i get the same error.

EDIT: Tried this approach having the IE proxy configured in Settings > Connections > LAN

WebRequest request = WebRequest.Create
("http://weather.noaa.gov/pub/data/observations/metar/stations/LGSO.TXT");
request.Proxy = WebRequest.GetSystemWebProxy();
request.Credentials = CredentialCache.DefaultCredentials; ;
WebResponse response = request.GetResponse();

Now I get proxy (407) Proxy Authentication Required.

You should set credentials on `proxy` object. Check [this](http://code.logos.com/blog/2010/01/using_http_proxy_servers.html) article... — csharpfolk, Sep 26 '13 at 07:04
I tried using the default credentials for the proxy as suggested in the article because the proxy is configured in IE > Connections > LAN but I still get 404 — jayt.dev, Sep 26 '13 at 07:28

score 1 · Accepted Answer · answered Sep 27 '13 at 13:31

Finally it worked with the following:

IWebProxy myProxy = WebRequest.DefaultWebProxy;
myProxy.Credentials = new NetworkCredential(username, password);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(requestURL);          
request.Proxy = myProxy;

score 0 · Answer 2 · edited May 23 '17 at 12:23

0

See if this works.

WebRequest request = WebRequest.Create("http://weather.noaa.gov/pub/data/observations/metar/stations/LGSO.TXT");

WebResponse response = request.GetResponse();
response.Close();

I too live behind a proxy, this above code is working just fine for me.

Did you see this? Proxy Basic Authentication in C#: HTTP 407 error

edited May 23 '17 at 12:23

Community

1
1

answered Sep 26 '13 at 08:31

Sree Harsha Nellore

428
5
12

Nope.. (407) Proxy Authentication Required. – jayt.dev Sep 26 '13 at 09:10
Did you see this? http://stackoverflow.com/questions/9603093/407-proxy-authentication-required-in-c-sharp – Sree Harsha Nellore Sep 26 '13 at 11:04

score 0 · Answer 3 · answered May 12 '16 at 08:17

If the proxy settings are inserted in IE and the program is running under the user that can pass the proxy settings would it be fine if you just change

request.Credentials = CredentialCache.DefaultCredentials;

TO

request.Credentials = CredentialCache.DefaultNetworkCredentials;

These are the only 2 lines i use: request.UseDefaultCredentials = true; request.Proxy.Credentials = CredentialCache.DefaultNetworkCredentials;

If you are running your program under an not allowed user of the proxy server or a build-in system account, you should use a possibillity where the user can insert his proxy settings.

Kind regards, Condra963

Correct Settings for Proxy

3 Answers3