[SOLVED] Access to ssh server in WAN network side

I just added this port forwarding rule to access my ssh server ( in the WAN network:

I noticed that the port 2222 is open on my Turris (port scan), but I can not login with
ssh -p 2222 from the LAN.

After some offline help: Turns out that the SSH server did not accept the username/password login method (as logged nicely to /var/log/auth.log). I leave the post here. Maybe it will be helpful to someone later.