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Asus RT-AC51U Wireless-AC750 Dual-Band Router

  • AC750 complete AC performance : 300+433 Mbps
  • Operating Frequency 2.4 GHz / 5 GHz
  • Antenna, External 5 dBi antenna x 2, Internal PCB antenna x 1

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QuickFind: 719190

Mfr part code: RT-AC51U

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    Asus RT-AC51U Wireless-AC750 Dual-Band Router Product Description

    Asus RT-AC51U Wireless-AC750 Dual-Band Router

    The Essential AC Upgrade

    ASUS RT-AC51U Dual-band Wireless-AC750 router gives you both fast wireless speed and great value to upgrade your home network to the latest 802.11ac Wi-Fi technology today. Experience simultaneous dual-band connectivity and enjoy 300 Mbps speed on the 2.4 GHz frequency and up to 433 Mbps in 5 GHz band. 

    Thanks to its multipurpose USB port, RT-AC51U is much more than just a router. Plug in a USB hard disk drive and you’ve got an instant file server â€" and one that extends into the cloud via ASUS AiCloud. Alternatively, attach a USB printer to RT-AC51U to create a print server for sharing one device with several users. The USB even accommodates 3G/4G mobile broadband dongles for two broadband (WAN) connections on one router so you’ll never again have to worry about your internet access going down. The port can even be used for powering gadgets such as smartphones and tablets, making it a handy charging station. 

    The easy-to-use ASUSWRT graphical user interface unlocks the power of RT-AC51U giving robust control to optimize your network for you. 30-second setup and easy traffic management means even network newbies can enjoy its sophisticated features, while power users will love its IPv6 support, multiple wireless SSIDs and secure VPN access.

    Next gen 802.11ac wireless, up to 3X faster than 1x1 wireless N routers

    Powered by 5th generation Wi-Fi (5G Wi-Fi), the 802.11ac chipset gives the RT-AC51U faster wireless speeds than N technology. At 2.4 GHz, it reaches 300 Mbps, while on the 5GHz band it blazes to 433 Mbps. The upgraded bandwidth has the higher capacity you need to increase Wi-Fi enjoyment at home. With notebooks, desktops, pads, and smartphones now all Wi-Fi-reliant, it’s time to upgrade to the next generation to expand you connectivity now and in the future.

    Dual-band connectivity for compatibility and performance

    Delivering 2.4 GHz and 5 GHz concurrent bands at up to 300 Mbps and 433 Mbps, respectively, the RT-AC51U has a total speed of up to 733 Mbps, and maintains complete stability. Perform basic tasks like Web browsing and file downloading on the 2.4 GHz band, while simultaneously allowing multiple devices to stream in Full HD or support online gaming and other bandwidth-demanding applications smoothly on the clearer 5 GHz band.

    No more dead zones with 150% the coverage

    Powerful two-way transmission improves Wi-Fi range by 150% compared generic routers, ensuring far-reaching coverage. The unique design of RT-AC51U means a connection you can always rely on.

    Add external storage, printers, and other devices to your network

    With built-in USB port, connect external storage, printers, and other devices to RT-AC51U and share them throughout your network at once.

    Robust control and optimization with ASUSWRT

    With the ASUSWRT dashboard UI, setup, monitor, and control network applications all in one intuitive area. On top of 30-second setup, multi-device detection, and flexible settings that make the most of your network performance, it’s been upgraded with quick scanning of USB storage connected to routers to verify data integrity and drive health. Dual WAN enables having two connections/ISPs on one router, with load balance and failover mode for added stability and redundancy to ensure uninterrupted internet access.

    Do you game a lot, or spend most of your time streaming videos? Whatever your planned use is, the RT-AC51U has Quality of Service (QoS) standards that let you select how much bandwidth is prioritized for virtually any task. Plus, the traffic monitor allows you to check your Web usage in a clear graphical interface. Try it.

    Easy 3-step setup

    Use your smartphone, tablet, or PC to effortlessly set up your ASUS router in less than 30 seconds¹ and in only 3 easy steps. Simply connect the cables to the router, open a Web browser, and follow the setup wizard to get you to the internet in no time.

    ASUS AiCloud â€" Your world on demand

    ASUS AiCloud keeps you connected to your data wherever and whenever you have an internet connection. It links your home network and online Web storage service2 and lets you access it through the AiCloud mobile app on your iOS or Android smartphone or through a personalized URL in a Web browser.

    Download and stream anywhere

    Download Master and enhanced media server let you download and play multimedia files stored on router-attached USB storage on a wide range of compatible devices such as PC, pad, PS4, Xbox, and smart TV. Download Master can also download files while your PC is turned off, and allows you to manage and monitor download status remotely.

    VPN server enabled

    Easily set up a VPN server to browse the web and access data â€" no matter where you are. Featuring PPTP encryption, your data transmission remains always secure and confidential.


    Network Standard  IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.11ac, IPv4, IPv6

    Product Segment  AC750 complete AC performance : 300+433 Mbps

    Data Rate:

    802.11a : 6,9,12,18,24,36,48,54 Mbps

    802.11b : 1, 2, 5.5, 11 Mbps

    802.11g : 6,9,12,18,24,36,48,54 Mbps

    802.11n : up to 300 Mbps

    802.11ac : up to 433 Mbps


    External 5 dBi antenna x 2

    Internal PCB antenna x 1

    Operating Frequency  2.4 GHz / 5 GHz

    Encryption  64-bit WEP, 128-bit WEP, WPA2-PSK, WPA-PSK, WPA-Enterprise , WPA2-Enterprise , Radius with 802.1x, WPS support

    Firewall & Access Control:

    - Firewall: 

    SPI intrusion detection

    - Access control: 

    Guest access

    Parental control

    Network service filter

    URL/Port filter

    VPN Support:

    IPSec Pass-Through

    L2TP Pass-Through

    PPTP server

    OpenVPN server

    OpenVPN client

    WAN Connection Type:

    Internet connection type : Automatic IP, Static IP, PPPoE(MPPE supported), PPTP, L2TP

    Dual Link support 

    Multicast Proxy support


    - Download master:

    Support BT, NZB, HTTP, ED2K

    Support encryption, DHT, PEX and magnet link

    Upload and download bandwidth control

    Download scheduling 

    - Media server:

    Image: JPEG

    Audio: mp3, wma, wav, pcm, mp4, lpcm, ogg

    Video: asf, avi, divx, mpeg, mpg, ts, vob, wmv, mkv, mov

    - Professional QoS:


    User definable rules for IP/MAC/Port

    Upload and Download bandwidth management

    ACK/SYN/FIN/RST/ICMP with Highest priority

    - Guest Access:

    2.4GHz guest network x 3, 5GHz guest network x 3

    - Printer Server: 

    Multifunctional printer support(Windows only)

    LPR protocol support

    - File server: 

    Samba and FTP server with account management

    - Network map

    - Traffic monitor


    RJ45 for 10/100 BaseT for WAN x 1, RJ45 for 10/100 BaseT for LAN x 4

    USB 2.0 x 1


    WPS Button, Reset Button, Power Button

    LED Indicator:

    USB x 1

    LAN x 1

    Wi-Fi x 1

    WAN x 1

    Power x 1

    Power Supply

    AC Input : 110V~240V(50~60Hz)

    DC Output : 12 V with max. 1 A current

    OS Support

    Windows 8 , 32bit/64bit

    Windows 7 , 32bit/64bit

    Windows Vista , 32bit/64bit

    Windows 2000 

    Windows XP , 32bit/64bit

    Windows Server 2003

    Windows Server 2008

    Mac OS X 10.1

    Mac OS X 10.4

    Mac OS X 10.5

    Mac OS X 10.6

    Mac OS X 10.7

    Mac OS X 10.8

    Mac OS X 

    Linux Kernel (Support Ubuntu only)



    Dimensions  189 x 129 x 36 ~ cm (WxDxH)

    Weight  270 g

    Package Content

    RT-AC51U Wireless-AC750 Cloud Router

    RJ-45 Cable

    Power Adapter

    Quick Start Guide

    Warranty Card

    Support CD (User manual & Utility software)

    Router Special Features  3G/4G data sharing, AiCloud, Printer server, Download Master, AiDisK, Multiple SSIDs, Parental Control

    Operation mode:

    Wireless router mode

    Access point mode

    Technical Specifications

    Expansion / Connectivity

    Interfaces WAN: 1 x Ethernet 10/100 - RJ-45 ¦ LAN: 4 x Ethernet 10/100 - RJ-45 ¦ USB 2.0: 1 x 4 pin USB Type A


    Frequency Band 2.4 GHz / 5 GHz
    Capacity Guest networks: 6
    Device Type Wireless router - 4-port switch (integrated)
    Enclosure Type Desktop
    Connectivity Technology Wireless, wired
    Data Link Protocol Ethernet, Fast Ethernet, IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n, IEEE 802.11ac
    Data Transfer Rate 733 Mbps
    Network / Transport Protocol PPTP, L2TP, IPSec, PPPoE, LPR/LPD, FTP
    Remote Management Protocol HTTP
    Encryption Algorithm MPPE, 128-bit WEP, 64-bit WEP, WPA-PSK, WPA2-PSK, WPA-Enterprise, WPA2-Enterprise
    Features Network monitoring, firewall protection, VPN support, Stateful Packet Inspection (SPI), print server, MAC address filtering, IPv6 support, URL filtering, parental control, IP address filtering, download client, Wi-Fi Multimedia (WMM) support, Quality of Service (QoS), Wi-Fi Protected Setup (WPS), IPSec passthrough, Samba support, FTP server, Multiple SSID support, static IP mode, ASUS AiDisk, reset button, bandwidth control, 3G/4G USB Dongle Support, dynamic IP mode, Traffic Control, Multicast Proxy support, VPN Server, ASUS AiCloud, ASUSWRT, Guest Zone support, L2TP passthrough
    Compliant Standards IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.1x, IEEE 802.11n, IEEE 802.11ac
    Status Indicators Power, WAN, LAN, wireless, USB


    Voltage Required AC 120/230 V (50/60 Hz)
    Power Device External power adapter


    Aerial External integrated and internal
    Antenna Qty 3


    Cables Included 1 x network cable

    Software / System Requirements

    OS Required Linux, Microsoft Windows 2000, Apple MacOS X, Apple MacOS X 10.1, Microsoft Windows Server 2003, Apple MacOS X 10.4, Apple MacOS X 10.6, Microsoft Windows Server 2008, Apple MacOS X 10.5, Android, Microsoft Windows Vista (32/64 bits), Ubuntu, Microsoft Windows 7 (32/64 bits), Microsoft Windows XP (32/64 bits), Apple MacOS X 10.7 Lion, Windows 8 (32/64 bits), Apple MacOS X 10.8

    Dimensions & Weight

    Width 18.9 cm
    Depth 12.9 cm
    Height 3.6 cm
    Weight 270 g

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