SSH from asterisk dialplan (OWrt 22.03)

Installing and Using OpenWrt
1

Has anyone tried to ssh from the asterisk dialplan to another machine?
I'm trying:
exten => 333,n,System(ssh -i /asterisk/.ssh/id_dropbear hostname5 'whoami > /tmp/SSH-WHOAMI')

In OWrt 18 and asterisk15 all worked. Now asterisk runs from its own user asterisk and all I tried was unsuccessful.

For testing reasons I set all CHMOD to 777 recursively for /asterisk directories and files (keys are located there). No effect.
Whoami from asterisk locally shows asterisk.
Locally asterisk creates (from the dialplan, so it reads and writes) files in /asterisk directory.
Even copied binary dropbear to home folder and changed permissions to 777 as well, to call it from there. No luck.
From console (root) all works.

2

Is the asterisk user set as allowed user for ssh?

3

hmmm... Not sure. How do I manage this except by the user permissions?

4

To confirm the error, bring up asterisk -r in a console. And dial the extension.

The possibility I have on my mind, is here: https://openwrt.org/docs/guide-user/security/secure.access

Basically add a user for ssh, then dial with that user.