PowerShell

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.

Chilkat PowerShell Downloads

Download Chilkat for PowerShell

PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$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-Object Chilkat.Socket
$success = $sshTunnel.SshOpenTunnel("ssh.example.com",22)
if ($success -eq $false) {
    $($sshTunnel.LastErrorText)
    exit
}

$success = $sshTunnel.SshAuthenticatePw("sshUser","sshPassword")
if ($success -eq $false) {
    $($sshTunnel.LastErrorText)
    exit
}

$mailman = New-Object Chilkat.MailMan

#  Configure the SMTP server connection.  These connections will travel through the tunnel.
$mailman.SmtpHost = "smtp.example.com"
$mailman.SmtpPort = 465
$mailman.SmtpSsl = $true
$mailman.SmtpUsername = "user@example.com"
$mailman.SmtpPassword = "myPassword"

#  Tell MailMan to route its connections through the existing tunnel.
$success = $mailman.UseSshTunnel($sshTunnel)
if ($success -eq $false) {
    $($mailman.LastErrorText)
    exit
}

#  SMTP operations now travel through the shared SSH tunnel.
$success = $mailman.VerifySmtpLogin()
if ($success -eq $false) {
    $($mailman.LastErrorText)
    exit
}

$("Authenticated with the SMTP server through the SSH tunnel.")