The ASUS RT-AC51U router has Gigabit WiFi, 4 100mbps ETH-ports and 0 USB-ports.
It is also known as the ASUS AC750 Dual-Band Wi-Fi Router.
ASUS RT-AC51U default Password , Login & Gateway settings :
Default Gateway IP: 192.168.1.1
Default username: admin
Default password: admin
Default subnet mask: 255.255.255.0
Default DNS server: 192.168.1.1
How to factory reset (hard reset) ASUS RT-AC51U :
You can factory reset your ASUS RT-AC51U in the following way(s)
Through the web-interface
Open your browser and navigate to the default gateway ip (see default settings below)
Sign in to the web-interface with the username and password you have selected, or try the defaulr username and password (see default settings below)
Under the advanced settings menu, select administration
Find the link ” Restore/Save/Upload Setting
Beside Factory default click on Restore
If prompted, click ok
With the reset button on the router
Locate the reset button on the backside of your unit
with a sharp object, e.g. a paperclip or pencil, press and hold the reset button for 5s or until the power led starts flashing
How to login to the ASUS RT-AC51U :
Make sure you are connected to the router’s network, either by Wi-Fi or ethernet cable.
Open your browser and visit
You should be prompted with a login dialogue.
Enter the username: admin
and the password admin
You will now be logged in. If you haven’t yet changed the defaul password, we recommend that you change it first
thing you do after logging in.
ASUS RT-AC51U router specifications :
CPU: 580 MHz
RAM: 64 MiB
Flash: 16 MiB
Custom firmwares: OpenWrt
WiFi: Gigabit (abgn+ac)
2.4GHz & 5GHz
WiFi throughput: n/a
1 x 100mbps port
4 x 100mbps ports
ASUS RT-AC51U review (quick overview)
Here is the quick comparison of how the ASUS RT-AC51U compares to
other routers on our site
For a full list of routers and how they compare to the RT-AC51U, check the
Router Buying Guide which will help you buy the most
Staying up to date with the latest firmware is a good idea to keep your router even more
from various security flaws.
If you want to squeeze a little bit of extra functionality out of your router, consider
an open-source firmware like dd-wrt, openWRT or LEDE. Flashing a custom ROM can greatly
the stability and functionality of your old router.
Following are the firmwares that we have identified existing for the ASUS RT-AC51U
Flashing OpenWrt on the ASUS RT-AC51U
The ASUS RT-AC51U is supported by OpenWrt according to their Table of
flashing OpenWrt onto it should be quite straigthforward.
We couldn’t find any specific instructions for flashin OpenWrt on the ASUS
RT-AC51U, but since it’s listed in their Table of Hardware as supported, you can
over to the
OpenWrt install instructions and read on there.
Note: Flashing custom firmwares is always on you’re on own risk. Make sure to
read OpenWrt’s wikis to understand the risks and how to proceed if something goes
ASUS stock firmware for the RT-AC51U
Stock firmwares for the RT-AC51U are available under the download section on the
support page. You can also refer
to the router’s manual for instructions on how to upgrade the firmware.