MikroTik: Default Firewall Rules
I’ve included the following rules for my benefit and future reference, but feel free to use them as you please. These are the generic default configuration firewall rules that usually come configured on MikroTik routers. Again, these are very basic, you will most likely want to add further rules for increased security. The value for “in-interface-list” will most likely need to be changed to reflect your current network environment. However, if you are not using interface lists, modify the rules accordingly by replacing the “in-interface-list” property and value with the “in-interface” property and value).