#StackBounty: #debian #ssh #networking #ftp #sftp SFTP isn't working anymore

Bounty: 50

Today I connected to sftp and it worked, but a few minutes later I got disconnected and couldn’t connect again. Restarting sshd did nothing, so I rebooted the server and sftp started working again for just a few minutes.

Here’s the last part of the log when I try to connect:

debug1: Authentication succeeded (publickey).
Authenticated to ns1 ([xx.xx.xx.xx]:22).
debug2: fd 4 setting O_NONBLOCK
debug1: channel 0: new [client-session]
debug2: channel 0: send open
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug1: Remote: /root/.ssh/authorized_keys:8: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug1: Remote: /root/.ssh/authorized_keys:8: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug2: channel_input_open_confirmation: channel 0: callback start
debug2: fd 3 setting TCP_NODELAY
debug2: client_session2_setup: id 0
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending subsystem: sftp
debug2: channel 0: request subsystem confirm 1
debug2: channel_input_open_confirmation: channel 0: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
packet_write_wait: Connection to xx.xx.xx.xx port 22: Broken pipe

I’m using openssh on Debian 10.9, everything is updated.

Thanks!


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