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Buttons

WPS Button, Reset Button, Power Button

WPS Button, Reset Button, Power Button, Wireless on/off Button, LED on/off Button

Package Content

RT-AC51 Wi-Fi router
1 x RJ-45 cable
1 x Power adapter
1 x QSG
1 x Warranty card

I/O Ports

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

RJ45 for Gigabits BaseT for WAN x 1,
RJ45 for Gigabits BaseT for LAN x 8,
USB 3.2 Gen 1 x 1
USB 2.0 x 1

Product Weight (g)

271 g

110g

IEEE 802.11a
IEEE 802.11b
IEEE 802.11g
WiFi 4 (802.11n)
WiFi 5 (802.11ac)
IPv4
IPv6

Parental Control

"Allow you to block access to unwanted websites and apps."
Customized Internet Schedule

Antenna

External antenna x 4

WiFi Data Rate

802.11a : up to 54 Mbps
802.11b : up to 11 Mbps
802.11g : up to 54 Mbps
WiFi 4 (802.11n) : up to 300 Mbps
WiFi 5 (802.11ac) : up to 433 Mbps

802.11a : up to 54 Mbps
802.11b : up to 11 Mbps
802.11g : up to 54 Mbps
WiFi 4 (802.11n) : up to 600 Mbps
WiFi 5 (802.11ac) : up to 1734 Mbps
1024QAM (2.4GHz) : up to 1000 Mbps
1024QAM (5GHz) : up to 2167 Mbps

Game

Game Boost / Acceleration
WTFast

Memory

16 MB Flash
64 MB RAM

128 MB Flash, 516 MB RAM

Administration

Configuration Backup and Restore
Diagnosis tools
Feedback System
System Log

Security

Open system, WPA/WPA2-Personal, WPA/WPA2-Enterprise
WPS
SSH
Firewall
• Maximum Firewall Keyword Filter : 64
• Maximum Firewall Network Service Filter : 32
• Maximum Firewall URL Filter : 64

AiProtection
Open system, WPA/WPA2-Personal, WPA/WPA2-Enterprise
WPS
SSH
Firewall
• Maximum Firewall Keyword Filter : 64
• Maximum Firewall Network Service Filter : 32
• Maximum Firewall URL Filter : 64

Traffic Control

• Bandwidth Limiter
-- Maximum Bandwidth Limiter Rule : 32
Traditional QoS
-- Maximum Traditional QoS Rule : 32
Traffic Monitor
• Real-time Traffic Monitor
• Wired Traffic Monitor
• Wireless Traffic Monitor
• Traffic Analysis Period : Daily, Weekly, Monthly

Adaptive QoS
• Bandwidth Monitor
• Bandwidth Limiter
-- Maximum Bandwidth Limiter Rule : 32
Traditional QoS
-- Maximum Traditional QoS Rule : 32
Traffic Monitor
• Real-time Traffic Monitor
• Wired Traffic Monitor
• Wireless Traffic Monitor
Traffic Analyzer
• Traffic Analysis Period : Daily, Weekly, Monthly
• Website History

AiMesh

AiMesh
• Primary AiMesh Router
• AiMesh Node

Operating Frequency

2.4GHz
5GHz

2.4G Hz / 5 GHz

Guest Network

"The Guest Network provides Internet connection for guests but restricts access to your local network."
• Maximum Guest Network Rule : 2.4GHz x3, 5GHz x3
Guest Network Connection Time Limit
Guest Network Encryption : Open system, WPA/WPA2-Personal

Processor

1.4 GHz dual-core processor

Wireless

UTF-8 SSID
WiFi MAC Address Filter
• Maximum MAC Filters : 64
Wireless Scheduler
Airtime Fairness
RADIUS Client
Explicit Beamforming

UTF-8 SSID
WiFi MAC Address Filter
• Maximum MAC Filters : 64
Wireless Scheduler
Airtime Fairness
RADIUS Client
Universal Beamforming
Explicit Beamforming

VPN

VPN Client L2TP
VPN Client Open VPN
VPN Client PPTP
VPN Server IPSec
VPN Server Open VPN
VPN Server PPTP

WAN

Internet connection Type : PPPoE, PPTP, L2TP, Automatic IP, Static IP
Port forwarding
• Maximum Port Forwarding Rule : 64
Port triggering
• Maximum Port Triggering Rule : 32
DMZ
DDNS
NAT Passthrough : PPTP, L2TP, IPSec, RTSP, H.323, SIP Passthrough,PPPoE relay

Internet connection Type : PPPoE, PPTP, L2TP, Automatic IP, Static IP
Dual WAN
3G / 4G LTE dongle
Port forwarding
• Maximum Port Forwarding Rule : 64
Port triggering
• Maximum Port Triggering Rule : 32
DMZ
DDNS
NAT Passthrough : PPTP, L2TP, IPSec, RTSP, H.323, SIP Passthrough,PPPoE relay

LAN

DHCP Server
IGMP Snooping
IPTV
Manually Assign IP Address
• Maximum Manually Assign IP Address Rule : 64
Wake on LAN (WOL)

DHCP Server
IGMP Snooping
IPTV
LAN Link Aggregation
Manually Assign IP Address
• Maximum Manually Assign IP Address Rule : 64
Wake on LAN (WOL)

USB application

File System : FAT16, FAT32, NT3G

File System : HFS+, NTFS, vFAT, ext2, ext3, ext4
HDD Hibernation
Safely Remove Disk
AiCloud
Download Master
AiDisk
Media Server
Time Machine
Samba Server
FTP Server
Shared Folder Privileges

Product Segment

AC3100 ultimate AC performance : 1000+2167 Mbps

Product Dimensions

177 x126 x 34 ~ mm (WxDxH)

113.33*120.5*21.59 mm

Transmit / Receive

MIMO technology
2.4GHz 2x2
5GHz 2x2

MIMO technology
2.4GHz 4x4
5GHz 4x4

AiProtection

• Router Security Assessment
• Malicious Site Blocking
• Two-Way IPS
• Infected Device Prevention and Blocking

Boosts Speed

Beamforming: standard-based and universal
1024-QAM high data rate
20/40/80 MHz bandwidth

Operating Mode

Accesspoint, Router

Accesspoint, AiMeshnode, Mediabridge, Repeater, Router

Power Supply

AC Input : 110V~240V(50~60Hz)
DC Output : 12 V with max. 0.5 A current

AC Input : 110V~240V(50~60Hz)
DC Output : 19 V with max. 2.37 A current

LED Indicator

Dual color Link/ Act LED

- The actual transfer speed of USB 3.0, 3.1, 3.2, and/or Type-C will vary depending on many factors including the processing speed of the host device, file attributes and other factors related to system configuration and your operating environment.
- Actual data throughput and WiFi coverage will vary from network conditions and environmental factors, including the volume of network traffic, building material and construction, and network overhead, result in lower actual data throughput and wireless coverage.
- Quoted network speeds and bandwidth based on current IEEE 802.11ac/802.11ax specifications. Actual performance may be affected by network and service provider factors, interface type, and other conditions. Connected devices must be 802.11ac/802.11ax compatible for best results.
- WPA/WPA2 enterprise is only available on single router, is not available under AiMesh mode.
- When traditional QoS is enabled, there will be limitations due to the actual Internet service bandwidth and different environment, and there may be a risk of speed reduction.
- Due to the different power supply requirements on USB external hard disk and 4G/5G Modem device, to ensure that the external device can be used stably, if the USB external device exceeds the standard USB 2.0 (5V/500mA) and USB 3.1 Gen 1 (5V/900mA) power supply requirements, you need to use it with an independent external power supply.
- If you use the product in conjunction with a third party service, you are responsible for complying with the third party provider's terms and conditions and privacy policy and are also at the risk of such use. ASUS does not provide support or guarantee continuous integration support for products that are not part of ASUS.