DukeCharles opened a new issue, #661:
URL: https://github.com/apache/mina-sshd/issues/661
### Version
2.14.0
### Bug description
The apache mina sshClient is unable to find the sftp server running on WSL
on the same machine using the hostname "localhost" and "127.0.0.1".
I was able to connect to the server using :
OpenSSH_for_Windows_9.5p1 a.ka the sftp command in cmd/powershell
winscp version 6.3.6
Paramiko library for python all of the them were using the following
parameters:
host = "localhost" port = "22" with correct wsl username and password
**how to reproduce**
1. Open powershell and run the command :
`wsl --install Ubuntu-24.04`
Create an account for the linux distro
2. Run the following command in order to install and start your SFTP server
`sudo apt update`
`sudo apt install openssh-server`
`sudo service ssh restart`
Now validate that the service is running
` sudo service ssh status`
Now you should have your sftp server running
Now create a maven project with the following dependency in Pom
```xml
<dependency>
<groupId>org.apache.sshd</groupId>
<artifactId>sshd-sftp</artifactId>
<version>2.14.0</version>
</dependency>
```
```xml
<dependency>
<groupId>org.apache.sshd</groupId>
<artifactId>sshd-core</artifactId>
<version>2.14.0</version>
</dependency>
```
Now run this code :
```java
public static void main( String[] args ) {
String host = "localhost";
int port = 22;
String username = "your-username";
String password = "your-password";
SshClient client = SshClient.setUpDefaultClient();
client.setServerKeyVerifier(AcceptAllServerKeyVerifier.INSTANCE);
client.start();
try (ClientSession session = client.connect(username, host,
port).verify(3000).getSession()) {
session.addPasswordIdentity(password);
session.auth().verify(3000);
SftpClient sftpClient =
SftpClientFactory.instance().createSftpClient(session);
//Sftp operation here
} catch (IOException ex) {
ex.printStackTrace();
throw new RuntimeException(ex);
} finally {
client.stop();
}
}
```
Normally you should be able to connect to the server and run some sftp
commands
PS. If I use the virtual ethernet IP of my WSL distro it worked.
### Actual behavior
```
[main] INFO org.apache.sshd.common.io.DefaultIoServiceFactoryFactory - No
detected/configured IoServiceFactoryFactory; using Nio2ServiceFactoryFactory
[main] INFO
org.apache.sshd.client.config.hosts.DefaultConfigFileHostEntryResolver -
resolveEffectiveResolver(sftpuser@localhost:22/null) no configuration file at
C:\Users\sftpuser\.ssh\config
org.apache.sshd.common.SshException:
DefaultConnectFuture[sftpuser@localhost/127.0.0.1:22]: Failed (IOException) to
execute: The remote computer refused the network connection
at
org.apache.sshd.common.future.AbstractSshFuture.lambda$verifyResult$2(AbstractSshFuture.java:146)
at
org.apache.sshd.common.future.AbstractSshFuture.formatExceptionMessage(AbstractSshFuture.java:206)
at
org.apache.sshd.common.future.AbstractSshFuture.verifyResult(AbstractSshFuture.java:145)
at
org.apache.sshd.client.future.DefaultConnectFuture.verify(DefaultConnectFuture.java:55)
at
org.apache.sshd.client.future.DefaultConnectFuture.verify(DefaultConnectFuture.java:36)
at
org.apache.sshd.common.future.VerifiableFuture.verify(VerifiableFuture.java:121)
at org.chuck.App.main(App.java:29)
Caused by: java.io.IOException: The remote computer refused the network
connection
at java.base/sun.nio.ch.Iocp.translateErrorToIOException(Iocp.java:299)
at java.base/sun.nio.ch.Iocp$EventHandlerTask.run(Iocp.java:389)
at java.base/java.lang.Thread.run(Thread.java:840)
Exception in thread "main" java.lang.RuntimeException:
org.apache.sshd.common.SshException:
DefaultConnectFuture[sftpuser@localhost/127.0.0.1:22]: Failed (IOException) to
execute: The remote computer refused the network connection
at org.chuck.App.main(App.java:39)
Caused by: org.apache.sshd.common.SshException:
DefaultConnectFuture[charles@localhost/127.0.0.1:2222]: Failed (IOException) to
execute: The remote computer refused the network connection
at
org.apache.sshd.common.future.AbstractSshFuture.lambda$verifyResult$2(AbstractSshFuture.java:146)
at
org.apache.sshd.common.future.AbstractSshFuture.formatExceptionMessage(AbstractSshFuture.java:206)
at
org.apache.sshd.common.future.AbstractSshFuture.verifyResult(AbstractSshFuture.java:145)
at
org.apache.sshd.client.future.DefaultConnectFuture.verify(DefaultConnectFuture.java:55)
at
org.apache.sshd.client.future.DefaultConnectFuture.verify(DefaultConnectFuture.java:36)
at
org.apache.sshd.common.future.VerifiableFuture.verify(VerifiableFuture.java:121)
at org.chuck.App.main(App.java:29)
Caused by: java.io.IOException: The remote computer refused the network
connection
at java.base/sun.nio.ch.Iocp.translateErrorToIOException(Iocp.java:299)
at java.base/sun.nio.ch.Iocp$EventHandlerTask.run(Iocp.java:389)
at java.base/java.lang.Thread.run(Thread.java:840)
Process finished with exit code 1
```
Meaning that I cant connect, but if
### Expected behavior
Normally it should find my sftp service
### Relevant log output
```Shell
```
### Other information
_No response_
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