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(PHP ActiveX) SSH Tunnel Inside another SSH TunnelDemonstrates how to create a TCP/IP socket connection through an SSH tunnel that is dynamic port forwarded through another SSH tunnel.
<?php // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // This example requires Chilkat version 9.5.0.50 or greater. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.SshTunnel') $tunnel = new COM("Chilkat.SshTunnel"); $sshHostname = 'www.ssh-serverA.com'; $sshPort = 22; // Connect to an SSH server and establish the SSH tunnel: $success = $tunnel->Connect($sshHostname,$sshPort); if ($success != 1) { print $tunnel->LastErrorText . "\n"; exit; } // Authenticate with the SSH server via a login/password // or with a public key. // This example demonstrates SSH password authentication. $success = $tunnel->AuthenticatePw('mySshLogin','mySshPassword'); if ($success != 1) { print $tunnel->LastErrorText . "\n"; exit; } // Indicate that the background SSH tunnel thread will behave as a SOCKS proxy server // with dynamic port forwarding: $tunnel->DynamicPortForwarding = 1; // We may optionally require that connecting clients authenticate with our SOCKS proxy server. // To do this, set an inbound username/password. Any connecting clients would be required to // use SOCKS5 with the correct username/password. // If no inbound username/password is set, then our SOCKS proxy server will accept both // SOCKS4 and SOCKS5 unauthenticated connections. $tunnel->InboundSocksUsername = 'chilkat123'; $tunnel->InboundSocksPassword = 'password123'; // Start the listen/accept thread to begin accepting SOCKS proxy client connections. // Listen on port 1080. $success = $tunnel->BeginAccepting(1080); if ($success != 1) { print $tunnel->LastErrorText . "\n"; exit; } // Now that a background thread is running a SOCKS proxy server that forwards connections // through an SSH tunnel, it is possible to use any Chilkat implemented protocol that is SOCKS capable, // such as HTTP, POP3, SMTP, IMAP, FTP, Socket, etc. The protocol may use SSL/TLS because the SSL/TLS // will be passed through the SSH tunnel to the end-destination. Also, any number of simultaneous // connections may be routed through the SSH tunnel. // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Socket') $tunnelB = new COM("Chilkat.Socket"); // Indicate that the socket object is to use our portable SOCKS proxy/SSH tunnel running in our background thread. $tunnelB->SocksHostname = 'localhost'; $tunnelB->SocksPort = 1080; $tunnelB->SocksVersion = 5; $tunnelB->SocksUsername = 'chilkat123'; $tunnelB->SocksPassword = 'password123'; // Open a new SSH tunnel through the existing tunnel (via what we treat as a SOCKS5 proxy, // but it is actually a dynamic port-forwarded SSH tunnel). $success = $tunnelB->SshOpenTunnel('www.ssh-serverB.com',22); if ($success != 1) { print $tunnelB->LastErrorText . "\n"; exit; } // Authenticate with ssh-serverB.com $success = $tunnelB->SshAuthenticatePw('uname','pwd'); if ($success != 1) { print $tunnelB->LastErrorText . "\n"; exit; } // OK, the SSH tunnel (within a tunnel) is setup. Now open a channel within the tunnel. // Once the channel is obtained, the Socket API may // be used exactly the same as usual, except all communications // are sent through the channel in the SSH tunnel. // Any number of channels may be created from the same SSH tunnel. // Multiple channels may coexist at the same time. // Connect to an NIST time server and read the current date/time $maxWaitMs = 4000; $useTls = 0; // channel is a Chilkat.Socket $channel = $tunnelB->SshOpenChannel('time-c.nist.gov',37,$useTls,$maxWaitMs); if ($tunnelB->LastMethodSuccess == 0) { print $tunnelB->LastErrorText . "\n"; exit; } // The time server will send a big-endian 32-bit integer representing // the number of seconds since since 00:00 (midnight) 1 January 1900 GMT. // The ReceiveInt32 method will receive a 4-byte integer, but returns // 1 or 0 to indicate success. If successful, the integer // is obtained via the ReceivedInt property. $bigEndian = 1; $success = $channel->ReceiveInt32($bigEndian); if ($success != 1) { print $channel->LastErrorText . "\n"; exit; } // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.CkDateTime') $dt = new COM("Chilkat.CkDateTime"); $dt->SetFromNtpTime($channel->ReceivedInt); // Show the current local date/time $bLocalTime = 1; print 'Current local date/time: ' . $dt->getAsRfc822($bLocalTime) . "\n"; // Close the SSH channel. $success = $channel->Close($maxWaitMs); if ($success != 1) { print $channel->LastErrorText . "\n"; exit; } // Stop the background listen/accept thread: $waitForThreadExit = 1; $success = $tunnel->StopAccepting($waitForThreadExit); if ($success != 1) { print $tunnel->LastErrorText . "\n"; exit; } // Close the SSH tunnel (would also kick any remaining connected clients). $success = $tunnel->CloseTunnel($waitForThreadExit); if ($success != 1) { print $tunnel->LastErrorText . "\n"; exit; } ?> |
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