(Detailed explanation of MikroTikRouterOS firewall and filtering, introduces MikroTikRouterOS firewall and filtering rules in detail. MikroTikRouterOS can filter packet status; P2P protocol filtering; source and scheme NAT; source MAC, IP address, port, IP protocol, protocol (ICMP, TCP, MSS, etc.), interface, internal data packets and connections for symbols, ToS bytes, content filtering, order priority and data frequency and time control, packet length control...)