[BUG] installed SSHD. SSH works, SCP works, SFTP fails.

[mrfixpl]

Describe the bug
When trying to connect over SFTP, connection is terminated immediately.

To Reproduce
Steps to reproduce the behavior:

1. Issue command: sftp root@10.173.189.1
2. I get error

...
debug1: Authentication succeeded (password).
Authenticated to 10.173.189.1 ([10.173.189.1]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: pledge: network
debug1: Sending environment.
debug1: Sending env LANG = pl_PL.UTF-8
debug1: Sending subsystem: sftp
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: client_input_channel_req: channel 0 rtype eow@openssh.com reply 0
debug1: channel 0: free: client-session, nchannels 1
debug1: fd 0 clearing O_NONBLOCK
Transferred: sent 2280, received 2008 bytes, in 0.1 seconds
Bytes per second: sent 16568.9, received 14592.3
debug1: Exit status 141
Connection closed

Expected behavior
SFTP prompt > should appear and SFTP session should not be terminated.

Firmware(please complete the following information):

• Brand: AU37x
• Hardware-type: MHI2_ER_AU37x_P5089
• Version MU: 1326

Additional context

• Same thing happens with all FTP/SFTP clients that I tried (ForkLift, CyberDuck, FileZilla...)
• I've commented out the banner from the sshd config. thought that it might be in the way of the proper connection.
• sshd installed via More Incredible Bash.

[andrewleech]

For my Linux box to connect to the mib I had to use .ssh/config settings like:

Host mib
  StrictHostKeyChecking no
  Hostname 192.168.0.207
  User root
  HostKeyAlgorithms +ssh-rsa
  PubkeyAcceptedAlgorithms +ssh-rsa

I'm pretty sure I used scp just fine, including WinSCP app, but don't remember ever using sftp.

[c727]

I also havnt tested SFTP...
The "normal" procedure is to copy your files from sdcard to unit using SSH 😅

[mrfixpl]

For my Linux box to connect to the mib I had to use .ssh/config settings like:

Host mib
  StrictHostKeyChecking no
  Hostname 192.168.0.207
  User root
  HostKeyAlgorithms +ssh-rsa
  PubkeyAcceptedAlgorithms +ssh-rsa

I'm pretty sure I used scp just fine, including WinSCP app, but don't remember ever using sftp.

I had some issues on one of my machines. Skipped the tutorial and used this command on the client side instead:

ssh -oHostKeyAlgorithms=+ssh-rsa root@10.173.189.1