我想创建一个隧道使用的服务的防火墙，支持SSH的后面。 我想在java中一个完整的解决方案，但我似乎无法得到它的工作。 我发现这个github上剪断 ，并基于该我创建了下面的代码，以保持一个后台线程给我的隧道：
// property on surrounding class
// static final SSHClient sshclient = new SSHClient();
Thread thread = new Thread(new Runnable() {
@Override
public void run() {
try {
String host = "10.0.3.96";
sshclient.useCompression();
sshclient.addHostKeyVerifier("30:68:2a:20:21:9f:c8:e8:ac:b4:a7:fc:2d:a7:d0:26");
sshclient.connect(host);
sshclient.authPassword("messy", "messy");
if (!sshclient.isAuthenticated()) {
throw new RuntimeException(String.format("Unable to authenticate against '%s'", host));
}
Forward forward = new Forward(8111);
InetSocketAddress addr = new InetSocketAddress("google.com", 80);
SocketForwardingConnectListener listener = new SocketForwardingConnectListener(addr);
sshclient.getRemotePortForwarder().bind(forward, listener);
sshclient.getTransport().setHeartbeatInterval(30);
HttpURLConnection con = (HttpURLConnection) new URL("http://localhost:8111").openConnection();
con.setRequestMethod("GET");
BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream()));
String line = null;
while( (line = reader.readLine()) != null) {
System.out.println(line);
}
sshclient.getTransport().join();
} catch (IOException e) {
e.printStackTrace();
}
try {
if (sshclient != null && sshclient.isConnected()) {
sshclient.disconnect();
}
} catch (IOException e) {
e.printStackTrace();
}
}
});
thread.setDaemon(true);
thread.start();
问题是，如果我连接到像'10 .0.3.96' 远程SSH服务器这是行不通的。 如果我使用本地SSH服务器在我的本地它将工作。 我一直在进行直通如果运气好的话，并试图调试不同的配置，但我无法掌握什么SSHj包里面发生。
现在，它并没有成为一个SSHj的解决方案，但是这将是首选，因为代码的其他部分完全实现并采用SSHj，我不希望在一个项目中混合两种SSH软件包。
谢谢你的帮助。
尝试这样的事情。 这需要在服务器连接到的列表。 它将隧道的最后一个服务器每个中间连接。 我还没有超过2个服务器进行测试，但它应该工作。 这个答案是从overthere项目调整和Groovy编写。 您应该只需要进口来得到它在groovyConsole中工作。
@Grab(group='net.schmizz', module='sshj', version='0.8.1')
@Grab(group='org.bouncycastle', module='bcprov-jdk16', version='1.46')
//the sequence of hosts that the connections will be made through
def hosts = ["server1", "server2"]
//the starting port for local port forwarding
def startPort = 2222
//username for connecting to all servers
def username = 'user'
def pw = 'pass'
//--------------------------------------------------------------------------//
final TunnelPortManager PORT_MANAGER = new TunnelPortManager()
//list of all active port forwarders
List<PortForwarder> portForwarders = []
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
/**
* Established the actual port forwarder
*/
class PortForwarder extends Thread implements Closeable {
private final SSHClient sshClient;
private final InetSocketAddress remoteAddress;
private final ServerSocket localSocket;
private CountDownLatch latch = new CountDownLatch(1);
public PortForwarder(SSHClient sshClient, InetSocketAddress remoteAddress, ServerSocket localSocket) {
this.sshClient = sshClient;
this.remoteAddress = remoteAddress;
this.localSocket = localSocket;
}
private static String buildName(InetSocketAddress remoteAddress, Integer localPort) {
return "SSH local port forward thread [${localPort}:${remoteAddress.toString()}]"
}
@Override
public void run() {
LocalPortForwarder.Parameters params = new LocalPortForwarder.Parameters("127.0.0.1", localSocket.getLocalPort(),
remoteAddress.getHostName(), remoteAddress.getPort());
LocalPortForwarder forwarder = sshClient.newLocalPortForwarder(params, localSocket);
try {
latch.countDown();
forwarder.listen();
} catch (IOException ignore) {/* OK. */}
}
@Override
public void close() throws IOException {
localSocket.close();
try {
this.join();
} catch (InterruptedException e) {/* OK.*/}
}
}
/**
* Will hand out local ports available for port forwarding
*/
class TunnelPortManager {
final int MAX_PORT = 65536
Set<Integer> portsHandedOut = new HashSet()
ServerSocket leaseNewPort(Integer startFrom) {
for (int port = startFrom; port < MAX_PORT; port++) {
if (isLeased(port)) {
continue;
}
ServerSocket socket = tryBind(port);
if (socket != null) {
portsHandedOut.add(port);
println "handing out port ${port} for local binding"
return socket;
}
}
throw new IllegalStateException("Could not find a single free port in the range [${startFrom}-${MAX_PORT}]...");
}
synchronized void returnPort(ServerSocket socket) {
portsHandedOut.remove(socket.getLocalPort());
}
private boolean isLeased(int port) {
return portsHandedOut.contains(port);
}
protected ServerSocket tryBind(int localPort) {
try {
ServerSocket ss = new ServerSocket();
ss.setReuseAddress(true);
ss.bind(new InetSocketAddress("localhost", localPort));
return ss;
} catch (IOException e) {
return null;
}
}
}
PortForwarder startForwarder(PortForwarder forwarderThread) {
forwarderThread.start();
try {
forwarderThread.latch.await();
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
return forwarderThread;
}
SSHClient getSSHClient(username, pw, String hostname, int port=22){
SSHClient client = new SSHClient()
client.addHostKeyVerifier(new PromiscuousVerifier())
client.connect(hostname, port)
client.authPassword(username, pw)
return client
}
int hostCount = hosts.size()
String hostname = hosts[0]
SSHClient client = getSSHClient(username, pw, hostname)
println "making initial connection to ${hostname}"
Session session
//create port forwards up until the final
for (int i=1; i<hostCount; i++){
hostname = hosts[i]
println "creating connection to ${hostname}"
ServerSocket ss = PORT_MANAGER.leaseNewPort(startPort)
InetSocketAddress remoteAddress = new InetSocketAddress(hostname, 22)
PortForwarder forwarderThread = new PortForwarder(client, remoteAddress, ss)
forwarderThread = startForwarder(forwarderThread)
session = client.startSession()
println "adding port forward from local port ${ss.getLocalPort()} to ${remoteAddress.toString()}"
portForwarders.add(forwarderThread)
client = getSSHClient(username, pw, "127.0.0.1", ss.getLocalPort())
}
session = client.startSession()
//shut down the running jboss using the script
Command cmd = session.exec("hostname")
String response = IOUtils.readFully(cmd.getInputStream()).toString()
cmd.join(5, TimeUnit.SECONDS)
println "response -> ${response}"
portForwarders.each { pf ->
pf.close()
}
session.close()
client.disconnect()
