We are having network problems because my router has got too much traffic on the internet facing ethernet port (ether1). It does not have a corresponding amount of traffic coming from the LAN side. I suspect some kind of some kind of scans or attacks coming from the wild internet. I do have a firewall configured inside the router, but I'm not sure it is configured correctly.
Router: Actually it's a PC running Mikrotik Router OS 6.36.2
Ports: 2; ether 1 and ether 2
Ether 1 has a public IP
Ether 2 has 192.168.0.1
Speed: 5Mbps UP 25MBps DOWN
Topology: Internet------>Cable Modem----->Router------>Sm
art Switch-------The rest of the tree