RT-AC51U
- Overview
- Tech Specs
- Review
- Support

Model Name
RT-AC51U
Network Standard
IEEE 802.11a
IEEE 802.11b
IEEE 802.11g
WiFi 4 (802.11n)
WiFi 5 (802.11ac)
IPv4
IPv6
IEEE 802.11b
IEEE 802.11g
WiFi 4 (802.11n)
WiFi 5 (802.11ac)
IPv4
IPv6
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
802.11b : 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
Antenna
External antenna x 2
Internal PCB antenna x 1
Internal PCB antenna x 1
Transmit/Receive
MIMO technology
2.4GHz 2x2
5GHz 1x1
2.4GHz 2x2
5GHz 1x1
Memory
8 MB Flash, 64 MB RAM
Operating Frequency
2.4G Hz / 5 GHz
Ports
RJ45 for 10/100 BaseT for WAN x 1, RJ45 for 10/100 BaseT for LAN x 4
USB 2.0 x 1
USB 2.0 x 1
Button
WPS Button, Reset Button, Power Button
LED Indicator
USB x 1
LAN x 1
Wi-Fi x 1
WAN x 1
Power 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
DC Output : 12 V with max. 1 A current
Package content
.RT-AC51U Wireless-AC750 Cloud Router
.RJ-45 Cable
.Power Adapter
.Quick Start Guide
.Warranty Card
.Support CD (User manual & Utility software)
.RJ-45 Cable
.Power Adapter
.Quick Start Guide
.Warranty Card
.Support CD (User manual & Utility software)
Product Weight (g)
g
Router APP
ASUS Router APP : ASUS Router APP
Parental Control
Parental Control : Parental Control
Parental Control Customized Internet schedule : Parental Control Customized Internet schedule
Parental Control Customized Internet schedule : Parental Control Customized Internet schedule
Traffic Control
Bandwidth limiter : Bandwidth limiter
Maximum Bandwidth limiter rule : 32
Traditional QoS : Traditional QoS
Maximum Traditional QoS rule : 32
Traffic Monitor : Traffic Monitor
Real-time traffic monitor : Real-time traffic monitor
Wired Traffic Monitor : Wired Traffic Monitor
Wireless Traffic Monitor : Wireless Traffic Monitor
Traffic analysis period : Daily, Weekly, Monthly
Maximum Bandwidth limiter rule : 32
Traditional QoS : Traditional QoS
Maximum Traditional QoS rule : 32
Traffic Monitor : Traffic Monitor
Real-time traffic monitor : Real-time traffic monitor
Wired Traffic Monitor : Wired Traffic Monitor
Wireless Traffic Monitor : Wireless Traffic Monitor
Traffic analysis period : Daily, Weekly, Monthly
Wireless
IPv6 : IPv6
Wi-Fi Encryption : Open system, WPA/WPA2-Personal, WPA/WPA2-Enterprise
UTF-8 SSID : UTF-8 SSID
Guest Network : Guest Network
Maximum Guest Network rule : 2.4GHz x3, 5GHz x3
Guest Network Encryption : Open system, WPA/WPA2-Personal
WPS : WPS
Wi-Fi MAC address filter : WiFi MAC address filter
Maximum MAC filters : 64
Wireless scheduler : Wireless scheduler
RADIUS Server : RADIUS Server
IGMP snooping : IGMP snooping
Wi-Fi Encryption : Open system, WPA/WPA2-Personal, WPA/WPA2-Enterprise
UTF-8 SSID : UTF-8 SSID
Guest Network : Guest Network
Maximum Guest Network rule : 2.4GHz x3, 5GHz x3
Guest Network Encryption : Open system, WPA/WPA2-Personal
WPS : WPS
Wi-Fi MAC address filter : WiFi MAC address filter
Maximum MAC filters : 64
Wireless scheduler : Wireless scheduler
RADIUS Server : RADIUS Server
IGMP snooping : IGMP snooping
WAN
Internet connection Type : PPPoE, PPTP, L2TP, Automatic IP, Static IP
3G/4G LTE dongle : 3G/4G LTE dongle
Android tethering : Android tethering
Port forwarding : Port forwarding
Maximum port forwarding rule : 64
Port triggering : Port triggering
Maximum port triggering rule : 32
DMZ : DMZ
DDNS : DDNS
NAT Passthrough : PPTP, L2TP, IPSec, RTSP, H.323, SIP Passthrough,PPPoE relay
3G/4G LTE dongle : 3G/4G LTE dongle
Android tethering : Android tethering
Port forwarding : Port forwarding
Maximum port forwarding rule : 64
Port triggering : Port triggering
Maximum port triggering rule : 32
DMZ : DMZ
DDNS : DDNS
NAT Passthrough : PPTP, L2TP, IPSec, RTSP, H.323, SIP Passthrough,PPPoE relay
LAN
DHCP Server : DHCP Server
IPTV : IPTV
Manually assign IP address : Manually assign IP address
IPTV : IPTV
Manually assign IP address : Manually assign IP address
VPN
VPN Client L2PT : VPN Client L2TP
VPN Client OVPN : VPN Client OVPN
VPN Client PPTP : VPN Client PPTP
VPN Server OVPN : VPN Server OVPN
VPN Server PPTP : VPN Server PPTP
VPN Client OVPN : VPN Client OVPN
VPN Client PPTP : VPN Client PPTP
VPN Server OVPN : VPN Server OVPN
VPN Server PPTP : VPN Server PPTP
USB application
File System : FAT16, FAT32, NT3G
3G/4G LTE dongle : 3G/4G LTE dongle
HDD hibernation : HDD hibernation
Safely Remove disk : Safely Remove disk
AiCloud : AiCloud
Download master : Download master
AiDisk : AiDisk
Media Server : Media Server
Samba Server : Samba Server
FTP Server : FTP Server
Shared Folder privileges : Shared Folder privileges
3G/4G LTE dongle : 3G/4G LTE dongle
HDD hibernation : HDD hibernation
Safely Remove disk : Safely Remove disk
AiCloud : AiCloud
Download master : Download master
AiDisk : AiDisk
Media Server : Media Server
Samba Server : Samba Server
FTP Server : FTP Server
Shared Folder privileges : Shared Folder privileges
Administration
Operating mode : Accesspoint, Router
Operating system : ASUSWRT
Free OS upgrade : Free OS upgrade
Firewall : Firewall
Maximum Firewall keyword filter : 64
Maximum Firewall network service filter : 32
Maximum Firewall URL filter : 64
Wake on LAN (WOL) : Wake on LAN (WOL)
SSH : SSH
Configuration backup and restore : Configuration backup and restore
Diagnosis tools : Diagnosis tools
Feedback system : Feedback system
System log : System log
Operating system : ASUSWRT
Free OS upgrade : Free OS upgrade
Firewall : Firewall
Maximum Firewall keyword filter : 64
Maximum Firewall network service filter : 32
Maximum Firewall URL filter : 64
Wake on LAN (WOL) : Wake on LAN (WOL)
SSH : SSH
Configuration backup and restore : Configuration backup and restore
Diagnosis tools : Diagnosis tools
Feedback system : Feedback system
System log : System log