AutoIt

SSH Through a SOCKS Proxy

Demonstrates connecting to an SSH server through a SOCKS4 or SOCKS5 proxy. Set the SOCKS properties before calling Connect, and set SocksVersion to match the proxy server.

Background: SOCKS is a general-purpose TCP relay, so unlike an HTTP proxy it is designed from the start to carry arbitrary protocols — usually the smoother option for SSH. The version matters: SOCKS4 supports only a username with no password, while SOCKS5 supports full login/password authentication as well as IPv6 and remote DNS resolution. Note this is the inverse of dynamic port forwarding: here a SOCKS proxy is used to reach the SSH server, rather than SSH providing a SOCKS proxy.

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Local $bSuccess = False

;  This example requires the Chilkat API to have been previously unlocked.
;  See Global Unlock Sample for sample code.

;  Demonstrates connecting to an SSH server through a SOCKS4 or SOCKS5 proxy.

$oSsh = ObjCreate("Chilkat.Ssh")

;  Set the SOCKS proxy properties before connecting.  The hostname may be a domain name or an
;  IP address.
$oSsh.SocksHostname = "socks.example.com"
$oSsh.SocksPort = 1080
$oSsh.SocksUsername = "mySocksLogin"
$oSsh.SocksPassword = "mySocksPassword"

;  Set the version to match the proxy server: 4 or 5.
;  Note: SOCKS4 supports only a username, with no password.  SOCKS5 supports full
;  login/password authentication.
$oSsh.SocksVersion = 5

Local $sHostname = "ssh.example.com"
Local $iPort = 22
$bSuccess = $oSsh.Connect($sHostname,$iPort)
If ($bSuccess = False) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Connected to the SSH server through the SOCKS proxy." & @CRLF)

;  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.
Local $sPassword = "mySshPassword"

$bSuccess = $oSsh.AuthenticatePw("mySshLogin",$sPassword)
If ($bSuccess = False) Then
    ConsoleWrite($oSsh.LastErrorText & @CRLF)
    Exit
EndIf

;  ... use the SSH connection normally ...

$oSsh.Disconnect