hey guys does mikrotik can stop those ping flooder??
thanks
Yes, mikrotik can.
You have to set up firewall filter rules that will drop ICMP packets that exceed certain limit. You can find information in documentation and in firewalling examples:
http://wiki.mikrotik.com/wiki/MikroTik_RouterOS
wow thanks mrz very informative link
give some juice 
if you dont like that one i can give you link to manual, firewall section.
chain=forward action=accept protocol=icmp limit=50/5s,2
chain=forward action=drop protocol=icmp
regards
we hoped that by browsing wiki and manual he would have found other interesting things to check and test