| import com.trilead.ssh2.Connection; |
| import com.trilead.ssh2.LocalPortForwarder; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| /** |
| * This example shows how to deal with port forwardings. |
| * |
| * @author Christian Plattner, plattner@trilead.com |
| * @version $Id: PortForwarding.java,v 1.2 2007/10/15 12:49:57 cplattne Exp $ |
| */ |
| public class PortForwarding |
| { |
| public static void sleepSomeTime(long milliSeconds) |
| { |
| try |
| { |
| Thread.sleep(milliSeconds); |
| } |
| catch (InterruptedException e) |
| { |
| } |
| } |
| |
| public static void main(String[] args) |
| { |
| String hostname = "127.0.0.1"; |
| String username = "joe"; |
| |
| File keyfile = new File("~/.ssh/id_rsa"); // or "~/.ssh/id_dsa" |
| String keyfilePass = "joespass"; // will be ignored if not needed |
| |
| try |
| { |
| /* Create a connection instance */ |
| |
| Connection conn = new Connection(hostname); |
| |
| /* Now connect */ |
| |
| conn.connect(); |
| |
| /* Authenticate */ |
| |
| boolean isAuthenticated = conn.authenticateWithPublicKey(username, keyfile, keyfilePass); |
| |
| if (isAuthenticated == false) |
| throw new IOException("Authentication failed."); |
| |
| /* ===== OK, now let's establish some local port forwardings ===== */ |
| |
| /* Example Port Forwarding: -L 8080:www.icann.org:80 (OpenSSH notation) |
| * |
| * This works by allocating a socket to listen on 8080 on the local interface (127.0.0.1). |
| * Whenever a connection is made to this port (127.0.0.1:8080), the connection is forwarded |
| * over the secure channel, and a connection is made to www.icann.org:80 from the remote |
| * machine (i.e., the ssh server). |
| * |
| * (the above text is based partially on the OpenSSH man page) |
| */ |
| |
| /* You can create as many of them as you want */ |
| |
| LocalPortForwarder lpf1 = conn.createLocalPortForwarder(8080, "www.icann.org", 80); |
| |
| /* Now simply point your webbrowser to 127.0.0.1:8080 */ |
| /* (on the host where you execute this program) */ |
| |
| /* ===== OK, now let's establish some remote port forwardings ===== */ |
| |
| /* Example Port Forwarding: -R 127.0.0.1:8080:www.ripe.net:80 (OpenSSH notation) |
| * |
| * Specifies that the port 127.0.0.1:8080 on the remote server is to be forwarded to the |
| * given host and port on the local side. This works by allocating a socket to listen to port |
| * 8080 on the remote side (the ssh server), and whenever a connection is made to this port, the |
| * connection is forwarded over the secure channel, and a connection is made to |
| * www.ripe.net:80 by the Trilead SSH-2 library. |
| * |
| * (the above text is based partially on the OpenSSH man page) |
| */ |
| |
| /* You can create as many of them as you want */ |
| |
| conn.requestRemotePortForwarding("127.0.0.1", 8080, "www.ripe.net", 80); |
| |
| /* Now, on the ssh server, if you connect to 127.0.0.1:8080, then the connection is forwarded |
| * through the secure tunnel to the library, which in turn will forward the connection |
| * to www.ripe.net:80. */ |
| |
| /* Sleep a bit... (30 seconds) */ |
| sleepSomeTime(30000); |
| |
| /* Stop accepting remote connections that are being forwarded to www.ripe.net:80 */ |
| |
| conn.cancelRemotePortForwarding(8080); |
| |
| /* Sleep a bit... (20 seconds) */ |
| sleepSomeTime(20000); |
| |
| /* Stop accepting connections on 127.0.0.1:8080 that are being forwarded to www.icann.org:80 */ |
| |
| lpf1.close(); |
| |
| /* Close the connection */ |
| |
| conn.close(); |
| |
| } |
| catch (IOException e) |
| { |
| e.printStackTrace(System.err); |
| System.exit(2); |
| } |
| } |
| } |