how to block other connection!!

My connections there are some of them marked with protocol to zero. How can I stop these connections?

what ROS version do you use?

2.9.42

update to the latest version. I don’t remember exactly, but as far as I remember it was fixed in late versions

I never get a chance to make the upgrade. How can I solve?

http://wiki.mikrotik.com/wiki/Upgrading_RouterOS