PHP

Connect to FTP Through a SOCKS Proxy

Demonstrates connecting through a SOCKS proxy using SocksVersion, SocksHostname, SocksPort, SocksUsername, and SocksPassword.

Background: SOCKS is a general-purpose TCP relay, so it carries FTP transparently. SocksVersion is the switch — 0 disables it, while 4 or 5 selects the protocol. SOCKS5 supports username/password authentication and is the usual choice; SOCKS4 supports only a user identifier. Because FTP opens separate data connections, a SOCKS proxy combined with passive mode is generally the most reliable arrangement.

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Chilkat2 PHP

<?php

use Chilkat2\Ftp2;

$ftp = new Ftp2();

$ftp->Hostname = 'ftp.example.com';
$ftp->Username = 'myFtpLogin';

// SocksVersion selects the proxy: 0 (default) = none, 4 = SOCKS4, 5 = SOCKS5.
$ftp->SocksVersion = 5;
$ftp->SocksHostname = 'socks.example.com';
$ftp->SocksPort = 1080;

// SOCKS5 supports username/password authentication; SOCKS4 uses only a user identifier.
$ftp->SocksUsername = 'myProxyLogin';
$ftp->SocksPassword = 'myProxyPassword';

// 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';

try {
    $ftp->Connect();
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo "Connected through the SOCKS proxy.\n";

try {
    $ftp->Disconnect();
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}