[RESOLVED] Using proxy with WebClient

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Hi, I am looking into using a proxy with the WebClient.

The code I am trying is:

VB.NET Code:

Using WClient As New WebClient
    WClient.Headers.Add(HttpRequestHeader.UserAgent, "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)")
 
    Dim WProxy As New WebProxy("<IP>:<Port>")
    WClient.Proxy = WProxy
 
    'I am using this website to test the current IP
    MessageBox.Show(Encoding.UTF8.GetString(WClient.DownloadData("http://checkip.dyndns.org/")))
End Using

When I retrieve my IP from dyndns using the MessageBox above it is showing my own IP. Some of the proxy IP's I have tested use https so I also tried the code below:

VB.NET Code:

Private Shared Function BypassCertificate(ByVal sender As Object, ByVal cert As X509Certificate, ByVal chain As X509Chain, ByVal [error] As System.Net.Security.SslPolicyErrors) As Boolean
    Return True
End Function
 
Private Sub TestProxy()
    ServicePointManager.ServerCertificateValidationCallback = New System.Net.Security.RemoteCertificateValidationCallback(AddressOf BypassCertificate)
    Using WClient As New WebClient
        WClient.Headers.Add(HttpRequestHeader.UserAgent, "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)")
 
        Dim WProxy As New WebProxy("<IP>:<Port>")
        WClient.Proxy = WProxy
 
        MessageBox.Show(Encoding.UTF8.GetString(WClient.DownloadData("http://checkip.dyndns.org/")))
    End Using
End Sub

However I still get the same result.

Am I doing this wrong? Or could it be that the proxy is working but that the IP lookup websites look beyond the proxy back to the source? If so, how would I test that it is working?

Thanks
Jay

Re: Using proxy with WebClient

My IP 86.9.199.38 Proxy <html><head><title>Current IP Check</title></head><body>Current IP Address: 64.78.30.2</body></html>

vb Code:

Imports System.Net
Imports System.Text
 
Public Class Form1
    Private Sub TestProxy()
 
        Dim proxy As New WebProxy("64.78.30.180:80")
 
        Using wClient As New WebClient
            wClient.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0")
            wClient.Proxy = proxy
 
            Try
                Me.RichTextBox1.Text = String.Format("My IP 86.9.199.38 Proxy {0}",
                                                 wClient.DownloadString(New Uri("http://checkip.dyndns.org/")))
            Catch ex As Exception
                MessageBox.Show(ex.Message)
            End Try
        End Using
    End Sub
 
End Class

Jun 21st, 2013, 05:28 AM
JayJayson

Re: Using proxy with WebClient

Your absolutely right. It seems there is nothing wrong with that code but rather the proxies I had tried. The site I grabbed them from has Transparent and Anonymous proxies. All my tests so far had been grabbing the Transparent ones.

Thanks for checking.
Jun 21st, 2013, 05:43 AM
ident

Re: [RESOLVED] Using proxy with WebClient

I was going to suggest make sure your proxy is not transparent. http://spys.ru/en/ Good luck.