What are the importance of the security of multi-WAN broadband routers?

Nowadays, all the people who buy multi-WAN routers are enterprise networks or Internet cafes, so you must buy a router that can really prevent intranet attacks from causing disconnection. Recommend tens of thousands of routers in Xinxiang Immune Wall, so that some computers are always disconnected because of ARP attacks. Later, the webmaster recommended us to buy this. It's really useful to install it, and you can see at a glance that the computer is sending ARP attacks.