Asus RT-AC66U - Manual (Page 22)

3.1.1 Setting up the wireless security settings
To protect your wireless network from unauthorized access, you
need to configure its security settings.
To set up the wireless security settings:
1. From the navigation panel, go to General > Network Map.
. On the Network Map screen and under System status, you can
configure the wireless security settings such as SSID, security
level, and encryption settings.
NOTE: You can set up different wireless security settings for 2.4GHz and
5GHz bands.
2.4GHz security settings