Our file transfer automation software is connecting to an external SFTP server to download files. It's connecting using Putty's command line tool PSFTP. When it kicks off at it's scheduled time, an error results. The error is:
Remote working directory is /directory
lcd: unable to change directory: Invalid Signature.
Using username "username".
Pre-authentication banner message from server:
| IM CCaaS FTP server
End of banner message from server
When I manually FTP to the server, I can log in with no issue. I then re-run the job and it completes successfully. I've googled this and found articles on key exchanges with similar errors, but this connection isn't using private/public keys. I cut over the application to a new Windows 2016 server on September 21st. There have been some successful transfers. I've also read the version of PSFTP may be the issue (0.73), but I would have expected consistent issues connecting. It seems sporadic. I'm not sure if the issue is on my end or at the destination. Any thoughts?
This is not SFTP problem. You have problem when changing a local working directory (using lcd command in the sftp client).
So this probably covers the problem:
System error 2148073478, extended error, or Invalid Signature error message on SMB connections in Windows Server 2012 or Windows 8.
Related
I wanted to make a ODBC connection from Windows PC to AS/400 DB2 server and I wrote a VBA program. But I got the following error.
Remote port could not be resolved
Then, I checked the status of server with CWSPING and got the result below:
I - Verifying connection to system 192.168.1.2...
I - Successfully connected to server application: Central Client
I - Successfully connected to server application: Network File
I - Successfully connected to server application: Network Print
I - Successfully connected to server application: Data Access
I - Successfully connected to server application: Data Queues
I - Successfully connected to server application: Remote Command
I - Successfully connected to server application: Security
E - CWBCO1011 - Remote port could not be resolved
E - CWBCO1008 - Unable to connect to server application DDM, returned 8407
I - Successfully connected to server application: Telnet
W - CWBCO1015 - Connection verified to system 192.168.1.2, but there were warnings
This means DDM service is not working on the server. ODBC connection requires DRDA, which runs upon DDM service, so I think running DDM service is the key to make ODBC connection. So I tried STRTCPSVR *DDM command but got the result below
*DDM not valid for parameter SERVER
And also tried CHGDDMTCPA AUTOSTART(*YES) PWDRQD(*YES) command, but got an error and I got stuck.
Command CHGDDMTCPA in library *LIBL not found
Does anyone have an idea of enabling DDM server on AS400?
Server: IBM AS400
OS version: V4R1
Try STRHOSTSVR *DATABASE.
STRHOSTSVR is used to start servers associated with IBM i Access and i Access Client Solutions.
STRTCPSVR is used, in general, to start servers associated with TCP/IP like FTP, Telnet, etc. Except the HTTP Server which is started via the Web Administration site at http://<server>:2001.
Additionally to the answer from #jmarkmurphy:
You can easily check netstat *cnn for open ports.
There is actually a tcpsvr named *ddm but that isn't used with ODBC.
ODBC-Access only needs host server *database. There aren't any further requirements for host servers.
For checking which services are started at tcp startup time, use strfdu, option 5 with the file qusrsys/qatocstart. From there you can easily view and change what should be started and what not.
Finally, I got connected by using JDBC. The summary of what I found is as follows:
ODBC seems using DRDA(port 446) but the server does not have DRDA/DDM service
OLEDB seems connecting Data Access(port 8471) but issued unknown error
JDBC also connection Data Access(port 8471) and it worked!
The first error I encountered when using ODBC is "Remote port could not be resolved". What happened behind this seems as follows:
ODBC asked Server Mapper(port 449) to find DRDA port(it may change on a server)
Server Mapper could not find DRDA port because the server has no DRDA service
ODBC showed "port not resolved" error
Then, I tried OLEDB this time. It checked user/password correctly but issued unknown error. When I put incorrect password, it showed "password is incorrect", which means OLEDB successfully log on to the server but got some error after sign on.
The last, I used JDBC and successfully connected! Generally, the connection url is like "jdbc:as400://" but it showed error. Using trace of JDBC, it seems to have problem on sign on to the server. So I changed the url to "jdbc:as400://:8471", then I finally connected. Looking into trace, it directly access to port 8741 and send user/password and get connected. I don't know the detail, but it worked!
Appreciated for your help!
I am using Apache Jmeter to send FTP load on a Server. After setting up the FTP request on specific IP and port, I get this error:
Requested action aborted: Access violation at address 005F6DB2 in module '***.exe'. Read of address 00000000
I know that I have all the access and I don't know why a module can block me, although I know that software (***.exe) is not blocking my ports. What is the problem?
Here is the attached Wireshark screenshot from the server when sending the clients request, the red line is the problem and it occurs in different places each time I run the test.
The problem doesn't seem to be related to JMeter
Try uploading file(s) using "normal" FTP client like FileZilla or WinSCP.
If the problem persists:
try identifying its cause using Windows Event Viewer
try to trace system calls using i.e. WinDbg
or just raise an issue on your application (FTP component)
If the problem does not occur on "real" FTP clients:
double check that your FTP Request sampler configuration is correct, see Load Testing FTP and SFTP Servers Using JMeter guide for details.
try uploading the file to the other, i.e. public FTP server to see if it works
try implementing file upload purely in Groovy using JSR223 Sampler. See FTPClientExample.java for the code you could re-use. Make sure you have the following line in your script:
ftpClient.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out), true))
I use cyberduck for SFTP my website files to the server. Dreamhost is the server.
In setting up a new bookmark in cyberduck I received this error "Connection failed - EOF while reading packet." [end of file]
The website is up and working fine, http://ce-t.org
Initially I thought this error had to do with the connection opening with cyberduck. So I setup a different bookmark to test and was able to do without a problem.
I have also deleted my first attempt to setup and reset up. This did not alter anything.
Now after doing more reading, may be in one of the website files?
As you can see i am a novice.
Help appreciated.
Usually when I run into this issue, its because my pw has expired.
Try SSHing into the server and change/update your pw. After I change it, I can FTP in.
This is 3 years too late for the OP. But I had this error when trying to make an SFTP connection to hosting on a Plesk server and the solution was to:
Enable the 'Access to the server over SSH' setting for the ftp user via the Plesk Control panel.
Of course you might need to contact your hosting service to get this done if you are not managing your own server.
In my case the same error occurred due to a syntax error in the .bashrc file on the remote server.
Also note that the default account setting for an FTP user at Dreamhost might specify an FTP connection. If so, trying to use Cyberduck to connect via SFTP will generate this error message. You can use the Dreamhost control panel to edit the user's record to specify SFTP.
In my case I have used dropbear ssh server.
I replace this server with openssh server, and now i can open the sftp connection without any issues.
I am trying out Eldos's SFTP Net Drive to map a drive to a virtual Ubuntu server. I works great when authenticating with a password. I have tried the normal/typical methods for configuring Key-based access. However, I receive error 10058. I have searched for clear instructions without success.
Anyone using this with Key-based access? Please share how you have it configured.
Thank you :)
If you're connecting via command line (e.g. using "open /profile:server" command line arguments) and you're accessing recently reinstalled server, the connection will silently fail because of changed server ssh fingerprint.
Try to reconnect manually (not using command line), accept new fingerprint and the problem will resolve.
This is because the server doesn't accept the key for whatever reason and closes connection. Usually this is an indicator of buggy server which normally should send the error packet in response.
But your question is offtopic here on StackOverflow.
I need to upload a file using ftp or http. I checked downloading from servers like ftp.qt.nokia.com. where download was successful[even though the file(s) downloaded was broken but with almost same size as on Web server]. I tried to upload a file to servers like qt.nokia.com,ftp.trolltech.com. Doing so When I used http, I got an html doc as a response with error count 0,but error string as unkown error. When I used ftp, connection was established, logged in but didn't close connection and again error string unkown error. My point is how can I know that whether my file is uploaded to a server successfully? Can I check it on my own system by setting up a server(for ex: Apache Tomcat server).
Set up a local FTP or HTTP server, you should not rely on any server you don't have full control over. A virtual machine is the probably the most hassle-free solution.