EnterpriseDT Q&A - Recent questions in Products

How do I reduce the size of the events.db file?

Mon, 23 Mar 2026 02:40:35 +0000

The events.db file in the CompleteFTP Logs folder has grown very large and I'm seeing "Failed to write events data" errors in the logs. How can I reduce its size or prevent it from growing too large?

Certificate will not load

Mon, 29 Dec 2025 15:34:24 +0000

I renewed a certificate and when I import the newly created certificate into my server, I get an error stating that the certificate failed to load. The message I get is "Failed to load server certificate. Please ensure a private key has been supplied and that the correct password has been used". I just created the PVK and CSR and saved the password to notepad and it still did not work. I tried creating a duplicate certificate using an new PVK and password and I get the same error. I am on version 25.1.0

Enterprise 10.0.0 offline Deactivation tells me This is not a valid Deactivation Key. Please help.

Tue, 28 Oct 2025 18:25:43 +0000

protocol error: unexpected packet type SSH_MSG_EXT_INFO

Wed, 10 Sep 2025 08:33:51 +0000

What would this message mean?

protocol error: unexpected packet type SSH_MSG_EXT_INFO

The stack trace is not much help:

EnterpriseDT.Net.Ftp.Ssh.SFTPException
        at EnterpriseDT.Net.Ftp.Ssh.SSHFTPClient.Connect()
        at EnterpriseDT.Net.Ftp.SecureFTPConnection.Connect()

The code works fine on my dev box but when run on the hosting server, connecting to the same FTP server, this error pops up occasionally. If the connect is attempted again, it works successfully.

The server log doesn't show anything unusual. All I can see there is "session opened" followed by "received disconnect".

There isn't much in the FTP component log, either.

INFO [ProtocolNegotiationHandler] 9 Sep 2025 09:58:02.461 : FTPConnection.1 Server version = 'SSH-2.0-""'
INFO [PuTTYPrivateKeyFormat3] 9 Sep 2025 09:58:03.040 :  Unpacking puTTY formatted private key 3
ERROR [SSHFTPClient] 9 Sep 2025 09:58:04.977 :  Failed to connect - closing connection
ERROR [SSHFTPClient] 9 Sep 2025 09:58:04.977 :  EnterpriseDT.Net.Ftp.Ssh.SFTPException: protocol error: unexpected packet type SSH_MSG_EXT_INFO
ERROR [SSHFTPClient] 9 Sep 2025 09:58:04.977 :     at EnterpriseDT.Net.Ftp.Ssh.SSHFTPClient.Connect()

This seems like a similar requirement, granted on the Ruby net-ssh implementation.
Ignore received SSH_MSG_EXT_INFO messages instead of raising an exception

The FTP client has not yet connected to the server

Mon, 18 Aug 2025 08:27:17 +0000

I've seen a few posts from years ago, but I haven't seen anything recent. What am I missing? Connecting to a simple sFTP server with user/password auth, and I can list files in a directory. But when I try to check if a file exists, I receive the error that "The FTP client has not yet connected to the server. The requested action cannot be performed until after a connection has been established."

This did not happen in the previous version I was using, 10.1. It only happened once I moved to the latest version, 12.5.0.

sftp.Connect();
var remoteFiles = sftp.ListDirectory(dataDirectory);
foreach (FTPFile remoteFile in remoteFiles)
{
if (remoteFile.Dir)
continue;
// check if this file is already in another directory
string anotherName = OtherDirectoryName + remoteFile.Name;
if (sftp.Exists(anotherName )) <<<<<< problem here

EnterpriseDT.Net.Ftp.FTPException
HResult=0x80131600
Message=The FTP client has not yet connected to the server. The requested action cannot be performed until after a connection has been established.
Source=edtFTPnetPRO
StackTrace:
at EnterpriseDT.Net.Ftp.FTPClient.pE4vf83jcr(Boolean )
at EnterpriseDT.Net.Ftp.FTPClient.Exists(String remoteFile)
at EnterpriseDT.Net.Ftp.FTPConnection.Exists(String remoteFile)

The FTP component is setup with a username and password.

Protocol = FileTransferProtocol.SFTP,

ServerValidation = SecureFTPServerValidationType.None,

Log (I hope the relevant sections - I'm limited in what I can post)

DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.159 : User authentication successful
......
DEBUG [SSHFTPClient] 18 Aug 2025 01:25:13.437 : Set transfer type = BINARY
DEBUG [FTPConnection] 18 Aug 2025 01:25:13.437 : Home directory is '/home/user'
DEBUG [FTPConnection] 18 Aug 2025 01:25:13.437 : GetFileInfos('/home/user/data_qa/')
DEBUG [SSHFTPClient] 18 Aug 2025 01:25:13.437 : ResolveRemotePath('/home/user/data_qa/'); [cwd='/home/user']
DEBUG [SSHFTPClient] 18 Aug 2025 01:25:13.437 : Resolved to '/home/user/data_qa'
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.437 : Send : Name=SSH_FXP_REALPATH,Type=16,RequestID=2
DEBUG [SSH2Channel] 18 Aug 2025 01:25:13.437 : Transmit 46 bytes
DEBUG [ChannelDataWindow] 18 Aug 2025 01:25:13.437 : Remote window size decreased to 2097083
DEBUG [PlainSocket] 18 Aug 2025 01:25:13.437 : Sent 84 bytes (NoDelay=True, SendBufferSize=65536, ReceiveBufferSize=65536)
DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.437 : Packet written to socket
DEBUG [PlainSocket] 18 Aug 2025 01:25:13.484 : FTPConnection.12 RepeatCallback received 132 bytes
DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.484 : FTPConnection.12 ProcessPacket pt=SSH_MSG_CHANNEL_DATA
DEBUG [SFTPMessageFactory] 18 Aug 2025 01:25:13.484 : FTPConnection.12 CreateMessage (bufferlength=100,offset=13,length=87,type=104)
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.484 : FTPConnection.12 SSH_FXP_NAME: requestID=2, 1 files
DEBUG [SFTPMessageStore] 18 Aug 2025 01:25:13.484 : FTPConnection.12 AddMessage(2) - added to store
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.484 : Reply : Name=SSH_FXP_NAME,Type=104,RequestID=2
DEBUG [SFTPSubsystem] 18 Aug 2025 01:25:13.484 : Opening directory /home/user/data_qa
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.484 : Send : Name=SSH_FXP_OPENDIR,Type=11,RequestID=3
DEBUG [SSH2Channel] 18 Aug 2025 01:25:13.484 : Transmit 46 bytes
DEBUG [ChannelDataWindow] 18 Aug 2025 01:25:13.484 : Remote window size decreased to 2097037
DEBUG [PlainSocket] 18 Aug 2025 01:25:13.484 : Sent 84 bytes (NoDelay=True, SendBufferSize=65536, ReceiveBufferSize=65536)
DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.484 : Packet written to socket
DEBUG [PlainSocket] 18 Aug 2025 01:25:13.531 : FTPConnection.12 RepeatCallback received 60 bytes
DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.532 : FTPConnection.12 ProcessPacket pt=SSH_MSG_CHANNEL_DATA
DEBUG [SFTPMessageFactory] 18 Aug 2025 01:25:13.532 : FTPConnection.12 CreateMessage (bufferlength=26,offset=13,length=13,type=102)
DEBUG [SFTPMessageStore] 18 Aug 2025 01:25:13.532 : FTPConnection.12 AddMessage(3) - added to store
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.532 : Reply : Name=SSH_FXP_HANDLE,Type=102,RequestID=3
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.532 : Send : Name=SSH_FXP_READDIR,Type=12,RequestID=4
DEBUG [SSH2Channel] 18 Aug 2025 01:25:13.532 : Transmit 17 bytes
DEBUG [ChannelDataWindow] 18 Aug 2025 01:25:13.532 : Remote window size decreased to 2097020
DEBUG [PlainSocket] 18 Aug 2025 01:25:13.533 : Sent 60 bytes (NoDelay=True, SendBufferSize=65536, ReceiveBufferSize=65536)
DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.533 : Packet written to socket
DEBUG [PlainSocket] 18 Aug 2025 01:25:13.582 : FTPConnection.12 RepeatCallback received 7676 bytes
DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.582 : FTPConnection.12 ProcessPacket pt=SSH_MSG_CHANNEL_DATA
DEBUG [SFTPMessageFactory] 18 Aug 2025 01:25:13.582 : FTPConnection.12 CreateMessage (bufferlength=7646,offset=13,length=7633,type=104)
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.582 : FTPConnection.12 SSH_FXP_NAME: requestID=4, 39 files
DEBUG [SFTPMessageStore] 18 Aug 2025 01:25:13.582 : FTPConnection.12 AddMessage(4) - added to store
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.582 : Reply : Name=SSH_FXP_NAME,Type=104,RequestID=4
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.582 : Send : Name=SSH_FXP_READDIR,Type=12,RequestID=5
DEBUG [SSH2Channel] 18 Aug 2025 01:25:13.582 : Transmit 17 bytes
DEBUG [ChannelDataWindow] 18 Aug 2025 01:25:13.582 : Remote window size decreased to 2097003
DEBUG [PlainSocket] 18 Aug 2025 01:25:13.582 : Sent 60 bytes (NoDelay=True, SendBufferSize=65536, ReceiveBufferSize=65536)
DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.583 : Packet written to socket
DEBUG [PlainSocket] 18 Aug 2025 01:25:13.623 : FTPConnection.12 RepeatCallback received 76 bytes
DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.623 : FTPConnection.12 ProcessPacket pt=SSH_MSG_CHANNEL_DATA
DEBUG [SFTPMessageFactory] 18 Aug 2025 01:25:13.623 : FTPConnection.12 CreateMessage (bufferlength=41,offset=13,length=28,type=101)
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.623 : FTPConnection.12 ErrorCode|Status=1
DEBUG [SFTPMessageStore] 18 Aug 2025 01:25:13.623 : FTPConnection.12 AddMessage(5) - added to store
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.623 : Reply : Name=SSH_FXP_STATUS,Type=101,RequestID=5
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.623 : Send : Name=SSH_FXP_CLOSE,Type=4,RequestID=6
DEBUG [SSH2Channel] 18 Aug 2025 01:25:13.623 : Transmit 17 bytes
DEBUG [ChannelDataWindow] 18 Aug 2025 01:25:13.623 : Remote window size decreased to 2096986
DEBUG [PlainSocket] 18 Aug 2025 01:25:13.623 : Sent 60 bytes (NoDelay=True, SendBufferSize=65536, ReceiveBufferSize=65536)
DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.623 : Packet written to socket
DEBUG [PlainSocket] 18 Aug 2025 01:25:13.667 : FTPConnection.12 RepeatCallback received 68 bytes
DEBUG [SSH2Connection] 18 Aug 2025 01:25:13.667 : FTPConnection.12 ProcessPacket pt=SSH_MSG_CHANNEL_DATA
DEBUG [SFTPMessageFactory] 18 Aug 2025 01:25:13.667 : FTPConnection.12 CreateMessage (bufferlength=37,offset=13,length=24,type=101)
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.667 : FTPConnection.12 ErrorCode|Status=0
DEBUG [SFTPMessageStore] 18 Aug 2025 01:25:13.667 : FTPConnection.12 AddMessage(6) - added to store
DEBUG [SFTPMessage] 18 Aug 2025 01:25:13.667 : Reply : Name=SSH_FXP_STATUS,Type=101,RequestID=6
DEBUG [FTPConnection] 18 Aug 2025 01:25:15.785 : Exists(/home/user/data_qa/processed/checkfile.zip)

Support for v3 Putty Key Files

Wed, 13 Aug 2025 12:58:06 +0000

Apologies if this has been asked, but I don't find the search very helpful at all.

EnterpriseDT.Net.Ftp.Ssh.SFTPException: 'Failed to recognize key format. Supported formats are OpenSSH, SSH.com and PuTTY.'

The problem? I'm trying to use an OpenSSH key which was automatically converted to a PuTTY key by FileZilla. It seems to be a PuTTY v3 key, and the product only supports v2.

PuTTY-User-Key-File-3: ssh-rsa

So now I'm using the OpenSSH key for my .NET code and the FileZilla-converted key for FZ. I'd like to be able to use the same key for both. Any plans to support v3 of PuTTY keys?

How do I know if my cipher is supported?

Tue, 08 Jul 2025 18:54:24 +0000

Hello,
I'm having issues (insufficient_security(71)) while trying to use ftps on edtftpj .This is the cipher I'm actually using: TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
I don't see it in the api guide, so just want to confirm the error is due to the cipher we are using.
Thanks

Listing only subfolders and a user has permission for

Tue, 24 Jun 2025 10:14:23 +0000

A CompleteFTP Enterprise MFT user asked:

In my CompleteFTP server (Enterprise MFT edition), I want to add a folder that dynamically hides any subfolders or files the current OS user (Windows or Linux) does not have permission to access. The goal is to prevent users from even seeing directories they can’t open, similar to Access-Based Enumeration (ABE) in Windows file shares.
Is there a way to make CompleteFTP list only the subfolders and files that the current user can actually access?

The host signature is invalid or the host key was not accepted!

Fri, 13 Jun 2025 05:34:04 +0000

I am using edtFTPj/PRO v8.2.2 and am getting this exception:

com.enterprisedt.net.ftp.ssh.SSHFTPKeyException: The host signature is invalid or the host key was not accepted!

at com.enterprisedt.net.ftp.ssh.SCPClient.connectSSH(SCPClient.java:1181)

…

Caused by: com.enterprisedt.net.j2ssh.transport.kex.KeyExchangeException: The host signature is invalid or the host key was not accepted!

at com.enterprisedt.net.j2ssh.transport.TransportProtocolClient.performKeyExchange(TransportProtocolClient.java:461)

…

I have this simple Java test client:

import java.io.IOException;

import com.enterprisedt.net.ftp.FTPException;

import com.enterprisedt.net.ftp.Protocol;

import com.enterprisedt.net.ftp.SecureFileTransferClient;

public class FTPClient {

public static void main(String[] args) throws FTPException, IOException {

SecureFileTransferClient client = new SecureFileTransferClient();

client.setRemoteHost("ftptest.xxx.com");

client.setRemotePort(22);

client.setUserName("user");

client.setPassword("password");

client.setProtocol(Protocol.SFTP);

client.setServerValidationEnabled(true);

client.connect();

client.uploadFile("/tmp/local.txt", "remote.txt");

client.disconnect();

}

Debug logging seems to indicate a key exchange problem:

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.590 : Starting key exchange

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.590 : Determine Algorithm

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.591 : Client Algorithms: [ecdh-sha2-nistp256, ecdh-sha2-nistp384, ecdh-sha2-nistp521, diffie-hellman-group1-sha1, diffie-hellman-group14-sha1, diffie-hellman-group14-sha256, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group-exchange-sha1, diffie-hellman-group-exchange-sha256, ext-info-c]

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.591 : Server Algorithms: [diffie-hellman-group14-sha1, curve25519-sha256, curve25519-sha256@libssh.org, ecdh-sha2-nistp256, ecdh-sha2-nistp384, ecdh-sha2-nistp521, diffie-hellman-group16-sha512, diffie-hellman-group18-sha512, diffie-hellman-group1-sha1]

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.591 : Returning ecdh-sha2-nistp256

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.591 : Key exchange algorithm: ecdh-sha2-nistp256

INFO [ECDHSha2] 12 Jun 2025 15:04:48.591 : Starting client side key exchange.

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.645 : Sending SSH_MSG_KEX_ECDH_INIT

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.742 : Received unregistered message: SSH_MSG_KEX_ECDH_REPLY

DEBUG [ECDHSha2] 12 Jun 2025 15:04:48.746 : calculateExchangeHash()

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.749 : Verifying host ftp.inmoment.com,44.239.215.42

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.749 : Determine Algorithm

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.749 : Client Algorithms: [ssh-rsa, rsa-sha2-256, rsa-sha2-512, ecdsa-sha2-nistp256, ecdsa-sha2-nistp384, ecdsa-sha2-nistp521, ssh-ed25519, ssh-dss]

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.749 : Server Algorithms: [rsa-sha2-512, rsa-sha2-256, ssh-rsa, ssh-rsa]

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.749 : Returning ssh-rsa

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.749 : Selected algorithm ssh-rsa

DEBUG [SshRsaPublicKey] 12 Jun 2025 15:04:48.753 : Signature length=404

DEBUG [SshRsaPublicKey] 12 Jun 2025 15:04:48.755 : Verifying signature (com.enterprisedt.cryptix.provider.rsa.SHA1_RSA_PKCS1Signature)

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.757 : The host signature is invalid

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.757 : sendDisconnect(9,'The host signature is invalid or the host key was not accepted!')

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.757 : Sending SSH_MSG_DISCONNECT

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.757 : stop() called

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.758 : Disconnect: The host signature is invalid or the host key was not accepted!

DEBUG [State] 12 Jun 2025 15:04:48.758 : Updated state to 5

DEBUG [TransportProtocolCommon] 12 Jun 2025 15:04:48.758 : sendDisconnect(11,'The host signature is invalid or the host key was not accepted!')

Any thoughts?

Modify 'From' email address and subject

Fri, 06 Jun 2025 12:17:04 +0000

For Process Trigger 2, is there a way to add a 'from' email address? What about a subject line?

var uploads = system.user.tags.get("uploads");
if (uploads) {
    uploads = JSON.parse(uploads);

    var message = "The following files were uploaded:\r\n";
    for (var i in uploads)
        message += "- " + uploads[i] + "\r\n";

    mail.smtp.server = "smtp.gmail.com";
    mail.smtp.port = 587;
    mail.smtp.userName = "my.account@gmail.com";
    mail.smtp.password = "my.password";
    mail.smtp.enableSSL = true;

    mail.send("sender@test.com", "recipient@test.com", "Files uploaded", message);
}

Is x509v3-ecdsa-sha2-nistp256 supported with latest edtftp-pro version 8.2.1

Thu, 05 Jun 2025 10:48:43 +0000

Can someone confirms if x509v3-ecdsa-sha2-nistp256, x509v3-ecdsa-sha2-nistp384 and x509v3-ecdsa-sha2-nistp521 are supported with version 8.2.1

When will EDF FTP.NET Support Session resumption for TLS1.3

Mon, 19 May 2025 12:53:07 +0000

Customers are getting more and more FTPS Servers enforcing TLS 1.3.

They also REQUIRE session resumption, as a potential vulnerability exists when having to re-negotiate the data tunnel (there is no guarantee that is it the same client creating the data channel if it is not re-using/resuming the parameters from the already negotiated control- channel)

So, when will EDF FTP.NET Support Session resumption for TLS1.3

How I find out what ciphers are supported for an edtFTPj/PRO version?

Fri, 09 May 2025 14:42:35 +0000

Hello,

One of our customers is switching to new ciphers and I need to find out whether the current version of edtFTPj/PRO we have supports it.

How do I go about this? Is it documented somewhere which ones are supported?

These are the ciphers I need to check whether they are supported:

ECDHE-RSA-AES256-GCM-SHA384

ECDHE-RSA-CHACHA20-POLY1305-SHA256

We are using versions edtFTPj-PRO-8.2.1.jar and edtFTPj-PRO-7.7.0.jar

Thanks!

Jan Brunia

athenahealth

What versions of SFTP and TLS are supported by edtFTPj/PRO 5.2.3?

Mon, 28 Apr 2025 07:30:02 +0000

Hi,

Due to recently changed TLS and SFTP versioning requirements, I'm looking into a legacy program that uses edtFTPj/PRO version 5.2.3 for my workplace. While the revision history page says this version supports TLS 1.2, I've been unable to find anything on the supported SFTP version and thought to reach out here.

Does edtFTPj/PRO version 5.2.3 support TLS version >= 1.2 and SFTP version >= 3?

Can users update their own email address?

Mon, 28 Apr 2025 07:22:41 +0000

Hi,

We're currently evaluating CompleteFTP and looking into the possibility of allowing users to update their own email address through a custom HTMLJSS form.

We tried using system.sudo() in the script, but received this error:

Only members of the admin group may execute the sudo function.

Is there a supported way for a regular user to update their own email — without requiring admin rights?

Thanks for any guidance!

Preventing multiple sessions per user (HTTP FileManager)

Mon, 28 Apr 2025 07:11:13 +0000

Hi,

We're trying to find a way to prevent multiple simultaneous sessions for the same user — specifically when accessing the server via the HTTP FileManager.

We've already tested the Max. connections per user setting, but it appears not to apply to HTTP-based logins. In practice, a single login opens several simultaneous connections, and the FileManager remains accessible even if those connections are closed.

Is there any recommended way to detect or block concurrent logins for the same user?
For example:

Rejecting a second login attempt while a session is still active
Using custom scripting to check for active sessions

We’d really appreciate guidance on the best approach to handle this.

Thanks and sorry for my poor English.

Sending email in HTML format

Sat, 29 Mar 2025 02:11:43 +0000

I created a "Process Trigger" that sends an email when the user logs out. In the body of the email, I send a list of all the files that were uploaded, to which folder and at what date and time this occurred. My idea is that this email serves as a protocol for sending files for auditing purposes.

To improve the presentation of the email, can it be sent in HTML? That way I could include the Company logo, for example.

massively change the permissions of all folders

Thu, 20 Mar 2025 16:58:38 +0000

Hello Everyone,

It's been a while since I last posted a question.

I'm resuming my evaluation of CompleteFTP as a replacement for my old Filezilla Server.

I was able to import the users without any problems.

Now I have a question: I would like to massively change the permissions of all folders for non-Windows users. Is there a way to do this without having to do it one by one?

Regards,

Is TLS session resumption supported?

Tue, 04 Mar 2025 07:52:48 +0000

Hi Support,

Could you please confirm if TLS session resumption is supported by CompleteFTP?

I'm getting a message "his server does not support tls session resumption on the data connection" while connecting to CompleteFTP server using Filezilla FTP client.

Thank you in advance.

insufficient_security(71) in all connection Library v. 12.2.2.0

Tue, 18 Feb 2025 02:17:40 +0000

We got the error insufficient_security(71) in all connection to an FTPS, here is my log.

Why could be the error insufficient_security(71)

DEBUG [SecureSocket] 4 Feb 2025 13:25:44.884 : ChangeSecurityProtocol: Tls12, Tls13
DEBUG [SecureSocket] 4 Feb 2025 13:25:44.884 : Starting handshake
DEBUG [SocketController] 4 Feb 2025 13:25:44.884 : Starting TLS client
DEBUG [EdtTlsClient] 4 Feb 2025 13:25:44.915 : Supported client versions: TLS 1.3, TLS 1.2
DEBUG [EdtTlsClient] 4 Feb 2025 13:25:44.931 : Supported client cipher suites: TLS_AES_128_GCM_SHA256,TLS_AES_256_GCM_SHA384,TLS_CHACHA20_POLY1305_SHA256,TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_DHE_RSA_WITH_AES_128_CBC_SHA,TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,TLS_DHE_RSA_WITH_AES_256_CBC_SHA,TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
ALL [SocketController] 4 Feb 2025 13:25:44.978 : Adding SendItem to to-send list
ALL [SocketController] 4 Feb 2025 13:25:44.978 : Removing SendItem from to-send list
DEBUG [SecureSocket] 4 Feb 2025 13:25:44.978 : Handshake started
DEBUG [SecureSocket] 4 Feb 2025 13:25:44.978 : Waiting for handshake completion
DEBUG [SecureSocket] 4 Feb 2025 13:25:44.978 : Waiting for handshake to complete (timeout=120000ms)
DEBUG [EdtTlsClient] 4 Feb 2025 13:25:44.994 : FTPConnection.2 Server version: TLS 1.2
DEBUG [EdtTlsClient] 4 Feb 2025 13:25:45.010 : FTPConnection.2 Selected cipher suite: TLS_DHE_RSA_WITH_AES_256_GCM_SHA384
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2 OnReceive - caught exception - closing
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2 EnterpriseDT.BouncyCastle.Tls.TlsFatalAlert: insufficient_security(71)
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2    at EnterpriseDT.BouncyCastle.Tls.TlsDHUtilities.ReceiveDHConfig(TlsContext context, TlsDHGroupVerifier dhGroupVerifier, Stream input)
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2    at EnterpriseDT.BouncyCastle.Tls.TlsDheKeyExchange.ProcessServerKeyExchange(Stream input)
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2    at EnterpriseDT.BouncyCastle.Tls.TlsClientProtocol.HandleHandshakeMessage(Int16 type, HandshakeMessageInput buf)
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2    at EnterpriseDT.BouncyCastle.Tls.TlsProtocol.dfUdv5dPaXf(ByteQueue )
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2    at EnterpriseDT.BouncyCastle.Tls.TlsProtocol.vnfdvj2UYdA(Int16 , Byte[] , Int32 , Int32 )
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2    at gItj6odjbF42mSmgbnHQ.Vj4lUUdjt4qmjCuyaqB9.iNadjr882i0(Byte[] , Int32 , Int32 )
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2    at EnterpriseDT.BouncyCastle.Tls.TlsProtocol.SafeReadFullRecord(Byte[] input, Int32 inputOff, Int32 inputLen)
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2    at EnterpriseDT.BouncyCastle.Tls.TlsProtocol.OfferInput(Byte[] input, Int32 inputOff, Int32 inputLen)
ERROR [SocketController] 4 Feb 2025 13:26:15.144 : FTPConnection.2    at F8p4QdKMOseLR9WjbZk.kxiDQ9KfSGUBSoEUVIl.x7kKB9ra76(IAsyncResult )
DEBUG [SocketController] 4 Feb 2025 13:26:15.160 : FTPConnection.2 CloseConnection(e=insufficient_security(71))
DEBUG [SocketController] 4 Feb 2025 13:26:15.160 : FTPConnection.2 Shut down socket
DEBUG [SocketController] 4 Feb 2025 13:26:15.160 : FTPConnection.2 Closed socket
DEBUG [TransferBuffer] 4 Feb 2025 13:26:15.160 : FTPConnection.2 Close() called when open
DEBUG [SecureSocket] 4 Feb 2025 13:26:15.160 : FTPConnection.2 OnHandshakeComplete(False,insufficient_security(71))
DEBUG [SecureSocket] 4 Feb 2025 13:26:15.160 : FTPConnection.2 OnHandshakeComplete - waiting for lock
DEBUG [SecureSocket] 4 Feb 2025 13:26:15.160 : FTPConnection.2 OnHandshakeComplete - in lock
DEBUG [SecureSocket] 4 Feb 2025 13:26:15.160 : FTPConnection.2 OnHandshakeComplete - exiting lock
DEBUG [SecureSocket] 4 Feb 2025 13:26:15.160 : FTPConnection.2 OnHandshakeComplete - exit
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 : Exception during handshake
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 : EnterpriseDT.BouncyCastle.Tls.TlsFatalAlert: insufficient_security(71)
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 :     at EnterpriseDT.BouncyCastle.Tls.TlsDHUtilities.ReceiveDHConfig(TlsContext context, TlsDHGroupVerifier dhGroupVerifier, Stream input)
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 :     at EnterpriseDT.BouncyCastle.Tls.TlsDheKeyExchange.ProcessServerKeyExchange(Stream input)
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 :     at EnterpriseDT.BouncyCastle.Tls.TlsClientProtocol.HandleHandshakeMessage(Int16 type, HandshakeMessageInput buf)
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 :     at EnterpriseDT.BouncyCastle.Tls.TlsProtocol.dfUdv5dPaXf(ByteQueue )
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 :     at EnterpriseDT.BouncyCastle.Tls.TlsProtocol.vnfdvj2UYdA(Int16 , Byte[] , Int32 , Int32 )
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 :     at gItj6odjbF42mSmgbnHQ.Vj4lUUdjt4qmjCuyaqB9.iNadjr882i0(Byte[] , Int32 , Int32 )
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 :     at EnterpriseDT.BouncyCastle.Tls.TlsProtocol.SafeReadFullRecord(Byte[] input, Int32 inputOff, Int32 inputLen)
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 :     at EnterpriseDT.BouncyCastle.Tls.TlsProtocol.OfferInput(Byte[] input, Int32 inputOff, Int32 inputLen)
ERROR [SecureSocket] 4 Feb 2025 13:26:15.160 :     at F8p4QdKMOseLR9WjbZk.kxiDQ9KfSGUBSoEUVIl.x7kKB9ra76(IAsyncResult )
DEBUG [SecureSocket] 4 Feb 2025 14:36:27.673 : FTPConnection.2 Close()

Does EnterpriseDT have a Maven repo we can download the jars from?

Wed, 12 Feb 2025 23:48:55 +0000

Hello,

Does EnterpriseDT have a Maven repo we can download the jars from?

We currently download them manually via our account, and it would be super convenient

if we could pull them from your Maven Repo by hooking it up to ours.

Thanks!

Jan

On edtFTPnet 11.1.1 all transfers are timing out, it only works if the cert is installed locally on the client.

Tue, 11 Feb 2025 08:18:49 +0000

DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.144 : Owner=**; key=**
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.144 : Expiry=12/31/9999 11:59:59 PM
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.144 : Flags: Flag 0=False;Flag 1=True;Flag 2=True;Flag 3=False;Flag 4=False;Flag 5=False;Flag 6=False;Flag 7=False;Flag 8=False;Flag 9=False;Flag 10=False;Flag 11=False
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.144 : IsTrial=False,Product=EdtFTPnetPRO
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.144 : Owner=**,IsTrial=False,Product=EdtFTPnetPRO
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.144 : Licence expiry date: 12/31/9999
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.144 : Production license
DEBUG [FTPConnection] 31 Jan 2025 21:08:47.160 : Set LocalDirectory='D:\TEST FTP - copia'
DEBUG [SecureFTPConnection] 31 Jan 2025 21:08:47.160 : Set LocalDirectory to D:\TEST FTP - copia
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.160 : Owner=**; key=**
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.160 : Expiry=12/31/9999 11:59:59 PM
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.160 : Flags: Flag 0=False;Flag 1=True;Flag 2=True;Flag 3=False;Flag 4=False;Flag 5=False;Flag 6=False;Flag 7=False;Flag 8=False;Flag 9=False;Flag 10=False;Flag 11=False
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.160 : IsTrial=False,Product=EdtFTPnetPRO
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.160 : Owner=**,IsTrial=False,Product=EdtFTPnetPRO
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.160 : Licence expiry date: 12/31/9999
DEBUG [LicenseProperties] 31 Jan 2025 21:08:47.160 : Production license
DEBUG [SSLFTPClient] 31 Jan 2025 21:08:47.160 : Connecting to x.x.x.x:2021
DEBUG [SSLFTPControlSocket] 31 Jan 2025 21:08:47.160 : waitOnShutdownSSL=True
DEBUG [SecureSocket] 31 Jan 2025 21:08:47.160 : ChangeSecurityProtocol: None
DEBUG [ExFTPControlSocket] 31 Jan 2025 21:08:47.160 : Created control-socket: SocksContext=, ProxySettings=NoProxy, RemoteHost=x.x.x.x, controlPort=2021, timeout=120000
DEBUG [FTPControlSocket] 31 Jan 2025 21:08:47.160 : StrictReturnCodes=False
DEBUG [HostNameResolver] 31 Jan 2025 21:08:47.160 : Resolving x.x.x.x
DEBUG [HostNameResolver] 31 Jan 2025 21:08:47.160 : x.x.x.x resolved to x.x.x.x
DEBUG [ExFTPControlSocket] 31 Jan 2025 21:08:47.160 : Connecting directly to ftp-server x.x.x.x:2021
INFO [SSLFTPSocket] 31 Jan 2025 21:08:47.160 : Connecting to x.x.x.x:2021 with timeout 120000 ms
DEBUG [SSLFTPSocket] 31 Jan 2025 21:08:47.175 : Successfully connected to x.x.x.x:2021
DEBUG [FTPControlSocket] 31 Jan 2025 21:08:47.175 : Setting socket timeout=120000
DEBUG [FTPControlSocket] 31 Jan 2025 21:08:47.175 : SetSocketTimeout: 120000
ALL [SecureSocket] 31 Jan 2025 21:08:47.175 : SecureSocket timeout=120000
ALL [SecureSocket] 31 Jan 2025 21:08:47.175 : SecureSocket timeout=120000
INFO [FTPControlSocket] 31 Jan 2025 21:08:47.175 : Command encoding=System.Text.SBCSCodePageEncoding
DEBUG [FTPControlSocket] 31 Jan 2025 21:08:47.175 : Setting socket buffer sizes=-1
DEBUG [FTPControlSocket] 31 Jan 2025 21:08:47.175 : SetSocketBuffers: -1
DEBUG [FTPControlSocket] 31 Jan 2025 21:08:47.175 : 220-FTP51FS1 IBM FTP CS V2R5 at xyz.central.testenv.com, 21:08:47 on 2025-01-31.
DEBUG [FTPControlSocket] 31 Jan 2025 21:08:47.175 : 220 Connection will close if idle for more than 20 minutes.
DEBUG [SSLFTPClient] 31 Jan 2025 21:08:47.175 : SetSSLProtocol: min=DETECT, max=DETECT
DEBUG [SSLFTPClient] 31 Jan 2025 21:08:47.175 : SetSSLProtocol=Tls1, Tls11, Tls12
DEBUG [FTPControlSocket] 31 Jan 2025 21:08:47.175 : ---> AUTH TLS
DEBUG [FTPControlSocket] 31 Jan 2025 21:08:47.191 : 234 Security environment established - ready for negotiation
DEBUG [SSLFTPControlSocket] 31 Jan 2025 21:08:47.191 : Beginning Tls1, Tls11, Tls12 handshake.
DEBUG [SecureSocket] 31 Jan 2025 21:08:47.191 : ChangeSecurityProtocol: Tls1, Tls11, Tls12
DEBUG [CompatibilityLayer] 31 Jan 2025 21:08:47.207 : Local min SSL version: 3.1, max SSL version: 3.3
DEBUG [SecureSocket] 31 Jan 2025 21:08:47.222 : Starting handshake
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : ECDHE_RSA_AES_128_SHA
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : ECDHE_RSA_AES_256_SHA
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : RSA_AES_128_GCM_SHA256
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : RSA_AES_256_GCM_SHA384
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : DHE_RSA_AES_128_GCM_SHA256
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : DHE_RSA_AES_256_GCM_SHA384
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : ECDHE_RSA_AES_128_GCM_SHA256
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : ECDHE_RSA_AES_256_GCM_SHA384
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : DHE_RSA_AES_128_SHA
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : DHE_RSA_AES_128_SHA256
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : DHE_RSA_AES_256_SHA
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : DHE_RSA_AES_256_SHA256
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : DHE_RSA_AES_256_SHA256
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : RSA_AES_128_SHA
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : RSA_AES_128_SHA256
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : RSA_AES_256_SHA256
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : RSA_AES_256_SHA
DEBUG [CipherSuites] 31 Jan 2025 21:08:47.222 : ECDHE_RSA_3DES_SHA
ALL [SocketController] 31 Jan 2025 21:08:47.222 : Adding SendItem to to-send list
ALL [SocketController] 31 Jan 2025 21:08:47.222 : Removing SendItem from to-send list
DEBUG [SecureSocket] 31 Jan 2025 21:08:47.222 : Handshake started
DEBUG [SecureSocket] 31 Jan 2025 21:08:47.222 : Waiting for handshake completion
DEBUG [SecureSocket] 31 Jan 2025 21:08:47.222 : Waiting for handshake to complete (timeout=120000ms)
DEBUG [SocketController] 31 Jan 2025 21:08:47.238 : FTPConnection.2 Processing hello
DEBUG [CompatibilityLayer] 31 Jan 2025 21:08:47.238 : FTPConnection.2 Remote SSL version: 3.3
DEBUG [HandshakeLayer] 31 Jan 2025 21:08:47.238 : FTPConnection.2 ProcessMessages(Handshake)
DEBUG [HandshakeLayer] 31 Jan 2025 21:08:47.238 : FTPConnection.2 Handshake Message: ServerHello
DEBUG [ClientHandshakeLayer] 31 Jan 2025 21:08:47.238 : FTPConnection.2 Cipher suite selected: DHE_RSA_AES_256_GCM_SHA384
DEBUG [ClientHandshakeLayer] 31 Jan 2025 21:08:47.238 : FTPConnection.2 Extension len=4
DEBUG [ClientHandshakeLayer] 31 Jan 2025 21:08:47.238 : FTPConnection.2 Extension type ExtendedMasterSecret
DEBUG [ClientHandshakeLayer] 31 Jan 2025 21:08:47.238 : FTPConnection.2 Using extended_master_secret
DEBUG [HandshakeLayer] 31 Jan 2025 21:08:47.238 : FTPConnection.2 Handshake Message: Certificate
DEBUG [HandshakeLayer] 31 Jan 2025 21:09:02.300 : FTPConnection.2 Handshake Message: ServerKeyExchange
DEBUG [ClientHandshakeLayer] 31 Jan 2025 21:09:02.332 : FTPConnection.2 ServerKeyExchange: hash=Sha1,sig=Rsa
DEBUG [HandshakeLayer] 31 Jan 2025 21:09:02.332 : FTPConnection.2 Handshake Message: ServerHelloDone
ALL [SocketController] 31 Jan 2025 21:09:02.363 : FTPConnection.2 Adding SendItem to to-send list
ALL [SocketController] 31 Jan 2025 21:09:02.363 : FTPConnection.2 Removing SendItem from to-send list
ERROR [SocketController] 31 Jan 2025 21:09:02.363 : FTPConnection.2 ResumeSending - caught exception - closing
ERROR [SocketController] 31 Jan 2025 21:09:02.363 : FTPConnection.2 System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
ERROR [SocketController] 31 Jan 2025 21:09:02.363 : FTPConnection.2 at System.Net.Sockets.Socket.BeginSend(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, AsyncCallback callback, Object state)
ERROR [SocketController] 31 Jan 2025 21:09:02.363 : FTPConnection.2 at Bof0GVpa2DeDdg2w5wd.g0LLb6p47riLdnVxxhw.VVuKOgiOBX()
DEBUG [SocketController] 31 Jan 2025 21:09:02.379 : FTPConnection.2 CloseConnection(e=An existing connection was forcibly closed by the remote host)
DEBUG [SocketController] 31 Jan 2025 21:09:02.379 : FTPConnection.2 Closed socket
DEBUG [TransferBuffer] 31 Jan 2025 21:09:02.379 : FTPConnection.2 Close() called when open
ERROR [SecureSocket] 31 Jan 2025 21:10:47.235 : Timeout waiting for handshake to complete
DEBUG [SocketController] 31 Jan 2025 21:11:15.607 : FTPConnection.2 Dispose()
DEBUG [SocketController] 31 Jan 2025 21:11:15.607 : FTPConnection.2 CloseConnection(e=null)

CompleteFTP - Get New Users

Mon, 10 Feb 2025 15:48:53 +0000

How can I create an event trigger to get all new users created today in JSS?

What could cause "Expected exception : The socket is EOF" that suddenly started appearing.

Sat, 08 Feb 2025 09:07:16 +0000

Hello,

We suddenly started seeing the EOF error when the client side key exchange started.

Expected exception : The socket is EOF

What could be probable causes to look at?

We double checked the pub key in the known_hosts file for host identification to use which is correct.

Was able to logon with OpenSSH sftp we have installed and the pub key in the known hosts file.

Completely puzzled why this happens with only one of our many connections we set up.

Thanks!

Jan

The error log:

DEBUG [TransportProtocolCommon] 7 Feb 2025 10:31:01.347 : Starting key exchange

DEBUG [TransportProtocolCommon] 7 Feb 2025 10:31:01.347 : Determine Algorithm

DEBUG [TransportProtocolCommon] 7 Feb 2025 10:31:01.347 : Client Algorithms: [ecdh-sha2-nistp256, ecdh-sha2-nistp384, ecdh-sha2-nistp521, diffie-hellman-group1-sha1, diffie-hellman-group14-sha1, diffie-hellman-group14-sha256, diffie-hellman-group-exchange-sha1, diffie-hellman-group-exchange-sha256, ext-info-c]

DEBUG [TransportProtocolCommon] 7 Feb 2025 10:31:01.347 : Server Algorithms: [ecdh-nistp384-kyber-768r3-sha384-d00@openquantumsafe.org, x25519-kyber-512r3-sha256-d00@amazon.com, ecdh-nistp256-kyber-512r3-sha256-d00@openquantumsafe.org, ecdh-nistp521-kyber-1024r3-sha512-d00@openquantumsafe.org, ecdh-sha2-nistp256, ecdh-sha2-nistp384, ecdh-sha2-nistp521, curve25519-sha256, curve25519-sha256@libssh.org, diffie-hellman-group18-sha512, diffie-hellman-group16-sha512, diffie-hellman-group-exchange-sha256]

DEBUG [TransportProtocolCommon] 7 Feb 2025 10:31:01.347 : Returning ecdh-sha2-nistp256

DEBUG [TransportProtocolCommon] 7 Feb 2025 10:31:01.347 : Key exchange algorithm: ecdh-sha2-nistp256

INFO [ECDHSha2] 7 Feb 2025 10:31:01.347 : Starting client side key exchange.

ALL [TransportProtocolCommon] 7 Feb 2025 10:31:01.732 : Name=SSH_MSG_KEX_ECDH_INIT,MessageId=30,Q_C=ô»öÈvÉ°–É½&C¯ÏàL¨ü¨ ×$r% ¸öÂ”¬CA¨'Z$@!þ"«Ûkc-íÜ¾»¸ÌÚª§

ALL [TransportProtocolOutputStream] 7 Feb 2025 10:31:01.732 : Sent message. Seq no=1, msg=30

WARN [TransportProtocolCommon] 7 Feb 2025 10:31:01.732 : The Transport Protocol thread failed: The socket is EOF

DEBUG [TransportProtocolCommon] 7 Feb 2025 10:31:01.732 : stop() called

DEBUG [State] 7 Feb 2025 10:31:01.732 : Updated state to 5

INFO [TransportProtocolCommon] 7 Feb 2025 10:31:01.732 : The Transport Protocol has been stopped

DEBUG [com.enterprisedt.net.ftp.ssh.SSHFTPClient] 7 Feb 2025 10:31:01.732 : Expected exception : The socket is EOF

java.io.IOException: The socket is EOF

at com.enterprisedt.net.j2ssh.transport.a.a(TransportProtocolInputStream.java:161)

at com.enterprisedt.net.j2ssh.transport.a.c(TransportProtocolInputStream.java:199)

at com.enterprisedt.net.j2ssh.transport.TransportProtocolCommon.readMessage(TransportProtocolCommon.java:1415)

at com.enterprisedt.net.j2ssh.transport.kex.ECDHSha2.performClientExchange(ECDHSha2.java:134)

at com.enterprisedt.net.j2ssh.transport.TransportProtocolClient.performKeyExchange(TransportProtocolClient.java:452)

at com.enterprisedt.net.j2ssh.transport.TransportProtocolCommon.beginKeyExchange(TransportProtocolCommon.java:733)

at com.enterprisedt.net.j2ssh.transport.TransportProtocolCommon.a(TransportProtocolCommon.java:1373)

at com.enterprisedt.net.j2ssh.transport.TransportProtocolCommon.startBinaryPacketProtocol(TransportProtocolCommon.java:1080)

at com.enterprisedt.net.j2ssh.transport.TransportProtocolCommon.run(TransportProtocolCommon.java:430)

at java.base/java.lang.Thread.run(Thread.java:829)