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Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Can't SSH to Arria 10 Dev Board

I just received our Arria 10 Dev Boards and I'm running through the quick start guide. I can get to the web interface and blink some lights and change the LCD message. I tried to SSH to it and the following happened:

$ ssh root@192.168.0.21The authenticity of host '192.168.0.21 (192.168.0.21)' can't be established.

ECDSA key fingerprint is SHA256:6Roa+AUDD3RyzVleUJS04lWWt7tdVvD1LrZBkHTwADE.

Are you sure you want to continue connecting (yes/no)? y

Please type 'yes' or 'no': yes

Warning: Permanently added '192.168.0.21' (ECDSA) to the list of known hosts.

Connection to 192.168.0.21 closed by remote host.

Connection to 192.168.0.21 closed.

All subsequent attempts end the same:

$ ssh root@192.168.0.21

Connection to 192.168.0.21 closed by remote host.

Connection to 192.168.0.21 closed.

Any idea what's happening?

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    8 years ago

    Try to add some -v's to get more verbose debug output: 

    ssh -vvv -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null root@192.168.0.21

    You can also see if you get any response from the server using telnet or netcat: 

    nc 192.168.0.21 22

    You should see something like:

    SSH-2.0-OpenSSH_7.5p1-hpn14v12

    depending upon the ssh version you hav running on your board.
    • PJais1's avatar
      PJais1
      Icon for New Contributor rankNew Contributor
      6 years ago

      Hello , i am facing same error.On entering the command :

      ssh -vvv -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null root@192.168.1.10

      OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014

      debug1: Reading configuration data /etc/ssh/ssh_config

      debug1: /etc/ssh/ssh_config line 19: Applying options for *

      debug2: ssh_connect: needpriv 0

      debug1: Connecting to 192.168.1.10 [192.168.1.10] port 22.

      debug1: Connection established.

      debug3: Incorrect RSA1 identifier

      debug3: Could not load "/home/bmit/.ssh/id_rsa" as a RSA1 public key

      debug1: identity file /home/bmit/.ssh/id_rsa type 1

      debug1: identity file /home/bmit/.ssh/id_rsa-cert type -1

      debug3: Incorrect RSA1 identifier

      debug3: Could not load "/home/bmit/.ssh/id_dsa" as a RSA1 public key

      debug1: identity file /home/bmit/.ssh/id_dsa type 2

      debug1: identity file /home/bmit/.ssh/id_dsa-cert type -1

      debug3: Incorrect RSA1 identifier

      debug3: Could not load "/home/bmit/.ssh/id_ecdsa" as a RSA1 public key

      debug1: identity file /home/bmit/.ssh/id_ecdsa type 3

      debug1: identity file /home/bmit/.ssh/id_ecdsa-cert type -1

      debug1: identity file /home/bmit/.ssh/id_ed25519 type -1

      debug1: identity file /home/bmit/.ssh/id_ed25519-cert type -1

      debug1: Enabling compatibility mode for protocol 2.0

      debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.13

      debug1: Remote protocol version 2.0, remote software version OpenSSH_7.8

      debug1: match: OpenSSH_7.8 pat OpenSSH* compat 0x04000000

      debug2: fd 3 setting O_NONBLOCK

      debug3: load_hostkeys: loading entries for host "192.168.1.10" from file "/dev/null"

      debug3: load_hostkeys: loaded 0 keys

      debug1: SSH2_MSG_KEXINIT sent

      and it hangs after this command.

      Also by entering : nc 192.168.1.10 22 , the terminal shows following output.

      SSH-2.0-OpenSSH_7.8

      Could you help with above query?

      Thanks,

      Priya