Amazon.com: ASUS Dual-Band 802.11ac Wireless-AC1200 (Up to 1200Mbps) Gigabit Router - AiRadar optimizes signal strength in any direction and USB 3.0 plus USB 2.0 ports for file, 3G/4G, and printer (RT-AC56R) :
Simple Instructions to Help Setup a Port Forward on the Asus RT-AC56U Router
Amazon.com: ASUS RTAC56U Wireless AC1200 Gigabit Router : Electronics
Reviewing the ASUS RT-AC56U - A Reasonably Priced AC Router