(The router is the main bridge connecting the local area network to the external network, an indispensable main component in the network system, and also the frontier gateway of network security. But the protection of the router is rarely paid attention to by us. Just imagine, if the router does not even guarantee its own security, the overall network will have no security at all. Therefore, in terms of network security management, routers must be reasonably planned and configured, and necessary security protection methods must be adopted to prevent loopholes and dangers to the overall network system due to the security problems of the routers themselves. We will introduce some methods and methods for routers to strengthen router security and make our network more secure.)