SSH on FreeNAS

We can connect to linux hosts. It depends on the commands the linux variant will receive.

You can use our SSH Custom sensor to issue the commands that FreeNAS accepts.

Do you know what CLI commands FreeNAS accepts for things like CPU, RAM, Disk, etc..?

I have tried SSH Meminfo and SSH Disk Free. SSH Disk Free sensor works great. On SSH Meminfo I got error "The host's system is unable to process PRTG's command: "cat /proc/meminfo"", but this is also OK because FreeNAS doesn't support cat /proc/meminfo command. So I assume that PRTG can connect to FreeNAS using SSH. Problem is SSH Script Advanced. When I tried to add this sensor I've got "Warning: no access to tty (Bad file descriptor)." under the Script drop-down menu instead of name of scripts. You can check it here: https://imgur.com/a/Iz1H5. Scripts are located under /var/prtg/scriptsxml. I've tried even with root credentials. I'm using this type of sensor on Linux machines and it works as expected. Also, I haven't found that FreeNAS/FreeBSD is supported: https://kb.paessler.com/en/topic/6733-which-linux-or-mac-os-distributions-are-supported-by-the-linux-unix-sensors-ssh-snmp. So maybe this is the problem?

Mata,

Change the directory to "/var/prtg/scripts"

That's the directory which we are looking for your scripts to reside.

I have changed directory to "/var/prtg/scripts", but unfortunately, I got the same error.

Hello Mata,

Can you manually SSH into the device, independently of PRTG? Keep in mind the sensor relies on "Linux/Solaris/Mac OS (SSH/WBEM) systems" credentials that need to be configured in the device's "Settings" tab. It seems to be more or less an access restriction related to the credentials or how SSH is set up on FreeNas, when googling for "no access to tty (Bad file descriptor)", there's quite a lot to be found.

Kind regards,

Erhard