MikroTik

Question about firewall.
Here is pic. Right side, from top to bottom.
1. Ping from 192.168.56.10 to 192.168.56.22
2. Ping from 192.168.56.23 to 192.168.56.22
3. Ping from 192.168.56.10 to wireless 192.168.56.64
4. Ping from 192.168.56.23 to wireless 192.168.56.64
-Top left Pic, connection filter protocol = icmp

Only ping #2 is showed. Why no ping #1 #3 #4 connection showed?

Probably depends on your topology, i.e. Some IPs is going via bridge / switch and CPU never sees them

Provide network diagram and device config for more assistance

Some IPs is going via bridge / switch and CPU never sees them

CZFan, I appreciate attention you gave for topic and thank you for suggestion! I think this is it. I will try to separate devices for few subnets and try again.