How do you install an ssh server on qnx?

Question

I\'m working on a qnx device, and I want to be able to ssh into it. Does anyone have a primer on getting something like openSSH up and running?

Answer 1

If you want to start a SSH server to transfer files easily. The SSH daemon (sshd) is already installed, but the 'configuration' is missing.

1. Create the keys (do NOT use a password):¹

   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
   

2. Create a user account different from root with a password.²

3. Add the user to the sshd group in: /etc/group => sshd:x:6:user1
4. Start by executing: /usr/sbin/sshd

For QNX 6.6.0, you have to do in addition:

5. Create another key

   ssh-keygen -t ecdsa -f /etc/ssh/ssh_host_ecdsa_key
   

   (The ECDSA key generation is only necessary for QNX 6.6.0 - see also here)

6. Create folders accordingly to fit this path /var/chroot/sshd/

If you want to use SFTP:

7. Create/Use the file /etc/ssh/sshd_config and enable Subsystem sftp /usr/libexec/sftp-server by adding this line to the file

---

Some steps are also covered here on the QNX manual about sshd command.

---

¹ ^{Here: the folder ssh/ was created in /etc/ and make sure the files belong to the user running the sshd!}

² ^{(i.e. direct root access via ssh is disabled by default but can be enabled by specifying PermitRootLogin yes in the /etc/ssh/sshd_config) file}