How to SFTP in Java (when SSH is disabled)

Question

My company has disabled SSH, but allows SFTP.

For example, "sftp" commands will work but "ssh" will not.

They may have configured something like this in "/etc/ssh/sshd_config":

    Match Group sftp-only
    ForceCommand internal-sftp
    ChrootDirectory /pub/sftp
    PermitTunnel no
    AllowAgentForwarding no
    AllowTcpForwarding no
    X11Forwarding no

Is there a SFTP client for Java that will work without having to open a SSH connection ?

I am using sshj and the typical pattern does not work:

import net.schmizz.sshj.*;

...

void connect() {
    SSHClient sshClient; 
    SFTPClient sftpClient;

    sshClient = new SSHClient();
    sshClient.connect(hostname, port);  // Port = 2233
    sshClient.authPublickey(username, privatekey);
    sftpClient = sshClient.newSFTPClient();
}

The above code throws an exception at "sshClient.connect()":

Exception in thread "main" java.net.ConnectException: Connection refused (Connection refused)
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.net.Socket.connect(Socket.java:589)
        at net.schmizz.sshj.SocketClient.connect(SocketClient.java:126)

How to SFTP in Java (when SSH is disabled)

0 Answers0