Connect to FTP Through an HTTP Proxy

See more FTP Examples

Demonstrates connecting through an HTTP proxy using HttpProxyHostname, HttpProxyPort, HttpProxyUsername, HttpProxyPassword, HttpProxyAuthMethod, and HttpProxyDomain.

Background: Many corporate networks force outbound traffic through an HTTP proxy, which reaches the FTP control connection via the CONNECT method — so the proxy must permit CONNECT to the FTP port. HttpProxyAuthMethod is Basic or NTLM, with HttpProxyDomain supplying the Windows domain for NTLM. This is distinct from a traditional FTP proxy, which speaks FTP itself.

Chilkat C# Downloads

Download Chilkat for C#

bool success = false;

Chilkat.Ftp2 ftp = new Chilkat.Ftp2();

ftp.Hostname = "ftp.example.com";
ftp.Username = "myFtpLogin";

//  The HTTP proxy through which the FTP control connection is made.  Common ports are 8080 and
//  3128.
ftp.HttpProxyHostname = "proxy.example.com";
ftp.HttpProxyPort = 8080;

//  Proxy authentication, if required.  HttpProxyAuthMethod is "Basic" or "NTLM"; HttpProxyDomain
//  is the Windows domain used for NTLM.
ftp.HttpProxyUsername = "myProxyLogin";
ftp.HttpProxyPassword = "myProxyPassword";
ftp.HttpProxyAuthMethod = "NTLM";
ftp.HttpProxyDomain = "CORP";

//  Normally you would not hard-code the password in source.  You should instead obtain it
//  from an interactive prompt, environment variable, or a secrets vault.
ftp.Password = "myPassword";

success = ftp.Connect();
if (success == false) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}

Debug.WriteLine("Connected through the HTTP proxy.");

success = ftp.Disconnect();
if (success == false) {
    Debug.WriteLine(ftp.LastErrorText);
    return;
}