Wednesday, November 3, 2021

[SOLVED] Unable to ssh into QNX 6.5.0 VirtualBox session

Issue

I've reinstalled the QNX RTOS 6.5.0 on virtualbox of which I was able to ssh into using the following command: ssh [email protected] -p 3022. The network settings inside my VirtualBox environment is set to NAT, and port forwarding set to:

QNX VirtualBox Network settings

When attempting to connect with -vvv flags:

$ ssh -vvv [email protected] -p 3022
OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n  7 Dec 2017
debug1: Reading configuration data /home/main/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "127.0.0.1" port 3022
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to 127.0.0.1 [127.0.0.1] port 3022.
debug1: Connection established.
debug1: identity file /home/main/.ssh/id_rsa type 0
debug1: key_load_public: No such file or directory
debug1: identity file /home/main/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/main/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/main/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/main/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/main/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/main/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/main/.ssh/id_ed25519-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
ssh_exchange_identification: Connection closed by remote host

On QNX I have the following options modified in /etc/ssh/sshd_config:

PermitRootLogin yes
PermitEmptyPasswords yes
Subsystem sftpd /usr/libexec/sftp-server

I am also able to ssh into my laptop via the vm, however not the other way around. I also tried ssh'ing into my laptop which works, then ssh'ing back into the vm in the same vm session and am presented with the same error.


Solution

Solved. The solution was to generate new rsa and dsa keys with:

random -t
ssh-keygen -t rsa -f /etc/ssh/ssh_host_key -b 1024
ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key

and then add sshd to the /etc/group list: sshd:x:6:root

then re-run sshd: /usr/sbin/sshd

source: How do you install an ssh server on qnx?

To extend on the above sourced solution, I found that on reboot I was no longer able to ssh into the VM. This was solved by going into /etc/rc.d/ and adding the line /usr/sbin/sshd to the rc.local file.



Answered By - user12241860
at