First sorry im not to good on english, but i hope u can help me!
I have a RB750 on my office , all computers,printers,server are connected on this router , ether 1 on this router i use as wan ,in this interface comes internet form my isp and have Public IP that i need to connect to my servers from outside my problem is that sometimes this interface have unknown traffic by 8mbps and proccesor goes 100% , but i dont know where this traffic come because on lan traffic is 0 , this problem solved when i change public ip but after one day this problem shown again ,i change router but same thing again, i disconect all computers and servers but traffic and packets on Wan interface still here, i think maybe someone or something attack my public ip but how can i stop this , did anyone have new filter rules for spam,flooding or anything