This document provides instructions for configuring a Mikrotik router for a local area network (LAN) with the following topology: an ISP modem connected to the WAN port of the Mikrotik router, and the Mikrotik's LAN ports connected to a switch or hub which then connects to client PCs. It describes setting static IP addresses and subnets for the WAN and LAN interfaces, configuring DNS and default gateway settings, enabling NAT and firewall rules to allow clients internet access while blocking specific sites, and rebooting the Mikrotik for the changes to take effect.