SshException: Failed to read remote identification [Unknown cause]

Question

I have set up the cygwin server to run sftp in my project, but i got these exception, how should i solve it?
Here is the exception :
com.maverick.ssh.SshException: com.maverick.ssh.SshException
     at com.maverick.ssh.SshException.<init>(Unknown Source)
     at com.maverick.ssh.SshConnector.A(Unknown Source)
     at com.maverick.ssh.SshConnector.connect(Unknown Source)
     at com.maverick.ssh.SshConnector.connect(Unknown Source)
     at qrcom.util.EdtFTPClient.edtUploadFile(EdtFTPClient.java:182)
     at qrcom.SUPPORT.files.dao.local.FTP.CreateFTPFileEON.runFTPFile(CreateFTPFileEON.java:183)
     at qrcom.SUPPORT.files.dao.local.FTP.CreateFTPFileEON.initFTPFile(CreateFTPFileEON.java:129)
     at qrcom.SUPPORT.files.dao.local.FTP.CreateFTPFileEON.startReport(CreateFTPFileEON.java:101)
     at qrcom.SUPPORT.files.dao.local.FTP.CreateFTPFileEON.main(CreateFTPFileEON.java:1052)
Caused by: com.maverick.ssh.SshException: Failed to read remote identification [Unknown cause]
     ... 9 more
these is the function that i think causes it :
public void edtUploadFile(String fileFullPath, String remoteFileName, ArrayList attachList, String strftpIP, String ftpPortNo, String strftpUserID, String strftpPwd, FTPMessage ftpMailMessage) throws FTPFileException, Exception{
StringBuffer ftpMailMsg = new StringBuffer();
FTPClient ftp = null;
FTPMessageCollector listener = null;
try
* Create an SshConnector instance
SshConnector con = SshConnector.getInstance();
// Lets do some host key verification
con.getContext(SshConnector.SSH2).setHostKeyVerification(new ConsoleKnownHostsKeyVerification("C:\\cygwin\\home\\wmlam\\.ssh\\known_hosts"));
Ssh2Context ssh2Context = (Ssh2Context)con.getContext(SshConnector.SSH2);
//ssh2Context.setPreferredPublicKey(Ssh2Context.PUBLIC_KEY_SSHDSS);
ssh2Context.setPreferredPublicKey(Ssh2Context.PUBLIC_KEY_SSHRSA);
* Connect to the host
int port = Integer.parseInt(ftpPortNo);
SocketTransport t = new SocketTransport(strftpIP, port);
t.setTcpNoDelay(true);
PublicKeyAuthentication pk = new PublicKeyAuthentication();
SshPrivateKeyFile pkfile = SshPrivateKeyFileFactory.parse(new FileInputStream("C:\\cygwin\\home\\wmlam\\.ssh\\id_rsa"));
SshKeyPair pair;
if(pkfile.isPassphraseProtected()) {
pair = pkfile.toKeyPair(Ssh2Context.PUBLIC_KEY_SSHRSA);
} else
pair = pkfile.toKeyPair(null);
pk.setPrivateKey(pair.getPrivateKey());
pk.setPublicKey(pair.getPublicKey());
SshClient ssh = con.connect(t, strftpUserID);
* Determine the version
if(ssh instanceof Ssh1Client) {
System.out.println(strftpIP + " is an SSH1 server!! SFTP is not supported");
ssh.disconnect();
System.exit(0);
else
System.out.println(strftpIP + " is an SSH2 server");
Ssh2Client ssh2 = (Ssh2Client)ssh;
* Authenticate the user using password authentication
com.maverick.ssh.PasswordAuthentication pwd = new com.maverick.ssh.PasswordAuthentication();
do {
pwd.setPassword(strftpPwd);
while(ssh2.authenticate(pwd)!=SshAuthentication.COMPLETE
&& ssh.isConnected());
* Start a session and do basic IO
if(ssh.isAuthenticated()) {
SftpClient sftp = new SftpClient(ssh2);
// Tell the client which EOL the remote client is using - note
// that this will be ignored with version 4 of the protocol
sftp.setRemoteEOL(SftpClient.EOL_LF);
// Now put the file, the remote file should end up with all \r\n changed to \n
//sftp.put(textFile.getAbsolutePath());
sftp.put(fileFullPath+remoteFileName);
* Now perform some binary operations
sftp.setTransferMode(SftpClient.MODE_BINARY);
* List the contents of the directory
SftpFile[] ls = sftp.ls();
for(int i=0;i<ls.length;i++) {
ls.getParent();
System.out.println(SftpClient.formatLongname(ls[i]));
ftpMailMsg.append("<TABLE border=1 width=100% cellspacing=1 cellpadding=1>");
ftpMailMsg.append("<TR>");
ftpMailMsg.append("<TD width=60%> <b>CSMS</b></TD>");
ftpMailMsg.append("<TD width=40%> <b>FTP</b></TD>");
ftpMailMsg.append("</TR>");
ftpMailMsg.append("<TR>");
ftpMailMsg.append("<TD>"+fileFullPath+"</TD>");
ftpMailMsg.append("<TD>"+remoteFileName+"</TD>");
ftpMailMsg.append("</TR>");
if(attachList!=null && !attachList.isEmpty()){
Iterator iter = attachList.iterator();
String [] strAtth;
String strAtthPathAndName = "";
String strAtthFTPServerFileName = "";
for(int i=0; i<attachList.size();i++){
strAtth = (String [])attachList.get(i);
strAtthPathAndName = qrMisc.trim(strAtth[1]);
strAtthFTPServerFileName = qrMisc.trim(strAtth[2]);
sftp.setTransferMode(SftpClient.MODE_BINARY);
sftp.put(strAtthPathAndName,strAtthFTPServerFileName);
ftpMailMsg.append("<TR>");
ftpMailMsg.append("<TD>"+strAtthPathAndName+"</TD>");
ftpMailMsg.append("<TD>"+strAtthFTPServerFileName+"</TD>");
ftpMailMsg.append("</TR>");
ftpMailMsg.append("</TABLE>");
if(ftpMailMessage!=null){
String tmpFtpMailMsg = qrMisc.trim(ftpMailMsg.toString());
ftpMailMessage.setFTPMessage(tmpFtpMailMsg);
System.out.println("Test complete");
ssh.disconnect();
catch(FileNotFoundException exp){
exp.printStackTrace();
     listener.logCommand("[FileNotFoundException]Error occur while transfering file :"+exp);
writeToLog(listener.getLog());
throw new FTPFileException("[FileNotFoundException] Error occur while transfering file :"+exp.toString());
}catch(IOException exp){
exp.printStackTrace();
     listener.logCommand("[IOException]Error occur while transfering file :"+exp);
writeToLog(listener.getLog());
throw new FTPFileException("[IOException] Error occur while transfering file :"+exp.toString());
} catch (Exception exp) {
exp.printStackTrace();
listener.logCommand("[Exception]Error occur while transfering file :"+exp);
writeToLog(listener.getLog());
throw new FTPFileException("[Exception] Error occur while transfering file :"+exp.toString());
the program stopped at this line, while trying to connect to ssh :
SshClient ssh = con.connect(t, strftpUserID);
Can i use ftp together with sftp? how can i solve this ?
Edited by: gloria_lai on Dec 13, 2007 9:54 AM

Answer 1

Hi,
The issue which you are facing can be the result of security or authentication problems (such as attempting to manage a remote server in an untrusted domain, for example; or attempting to manage a server by using credentials that are not recognized as those
of an administrator on the remote server), or configuration problems (missing Windows PowerShell, remote management not enabled on the target server, etc.). For more information you can refer below article.
Windows Server 2012 - Server Manager
Troubleshooting Guide, Part II: Troubleshoot Manageability Status Errors in Server Manager
In addition if you want to enable Remote Management you can try to enable using command line or Windows Power Shell. Go through
this article for additional details.
To Enable through Command line & Windows Power-Shell (Run as Administrator):
Configure-SMRemoting.exe –enable
Hope it helps!
Thanks.