PHP Extension

Use an Existing Socket SSH Tunnel

Demonstrates the Chilkat MailMan.UseSshTunnel method, which configures MailMan to use an existing SSH tunnel provided by a Socket object for its SMTP and POP3 connections. This example opens and authenticates a tunnel on a Socket, hands it to MailMan, and then verifies an SMTP login through it.

Background: Sharing one already-established SSH tunnel across objects avoids opening (and authenticating) a separate SSH connection for every component that needs to reach the remote network. Here the tunnel lives on a Socket object, which MailMan then routes its SMTP/POP3 traffic through. It is the Socket-based sibling of UseSsh, which shares an Ssh object instead.

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PHP Extension

<?php

include("chilkat.php");

$success = false;

//  Demonstrates the MailMan.UseSshTunnel method, which configures MailMan to use an existing
//  SSH tunnel provided by a Socket object for its SMTP and POP3 connections.

//  Open and authenticate the SSH tunnel using a Socket object.
$sshTunnel = new CkSocket();
$success = $sshTunnel->SshOpenTunnel('ssh.example.com',22);
if ($success == false) {
    print $sshTunnel->lastErrorText() . "\n";
    exit;
}

$success = $sshTunnel->SshAuthenticatePw('sshUser','sshPassword');
if ($success == false) {
    print $sshTunnel->lastErrorText() . "\n";
    exit;
}

$mailman = new CkMailMan();

//  Configure the SMTP server connection.  These connections will travel through the tunnel.
$mailman->put_SmtpHost('smtp.example.com');
$mailman->put_SmtpPort(465);
$mailman->put_SmtpSsl(true);
$mailman->put_SmtpUsername('user@example.com');
$mailman->put_SmtpPassword('myPassword');

//  Tell MailMan to route its connections through the existing tunnel.
$success = $mailman->UseSshTunnel($sshTunnel);
if ($success == false) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

//  SMTP operations now travel through the shared SSH tunnel.
$success = $mailman->VerifySmtpLogin();
if ($success == false) {
    print $mailman->lastErrorText() . "\n";
    exit;
}

print 'Authenticated with the SMTP server through the SSH tunnel.' . "\n";

?>