Versions 6.1
I played around with the "Filtering rules for traffic coming out from Zentyal " (stupid deny rule)
and locked myself out from the web interface.
These two CLI commands I found in the forum arn't working ( as the service does not exist):
sudo /etc/init.d/zentyal firewall stop
sudo /etc/init.d/service firewall stop
update found the needed CLI command to temporally stop the firewall
sudo zs firewall stop
Made the appropriate changes in the WEB interface and now all is good with the world.
then restarted firewall
sudo zs firewall start
Thanks to all who where going to reply but I got there first.