Use the asus-rt-ac66u/ folder for this router (hardware revision "A1"). For download locations and other info see Where do I download firmware in the FAQ Research "New Build" and model/rev forum threads: do not blindly install a latest build without checking Read the Peacock announcement for older recommended builds and general information.
Version 3.5-140 () MD5 ; RT-AC66U_AT-RT-AC6x-3.5-140-AIO-64K.trx: 21.64M: b45692bfef9efa5e7fc24272638350e0: 9,653: Download: Version 3.4-140 () MD5 ; RT-AC66U_AT-RT The BEST ASUS/WRT routers for VPN | Torrents | NAS/Cloud Sep 07, 2016 Asus RT-AC66U vs Asus RT-N66U: What is the difference?
Sep 07, 2016
How do you set up the ASUS wireless router as a VPN server
asus RT-AC66U vpn client - VPN Router Support - TorGuard
Jun 14, 2017 Amazon.com: ASUS RT-AC66U B1 AC1750 Dual-Band WiFi Router Rt-ac66u B1 delivers 3x3 802. 11AC Wi-Fi with up to 1750Mbps throughput and extensive coverage. Easily setup and manage your router with ASUSWRT and the ASUS router app. Integrated USB ports enable sharing for printers and USB storage with the ability to access files on-the-go via ASUS a I cloud 2.