To Login as Admin at
ASUS RT-AC51U Router use the guide below.
Connect your PC or Laptop via cable to your router. Or instead use your wireless network.
Suggestion - It is recommended for the connection to be done by using a cable attached to the ASUS RT-AC51U router. That will prevent you from losing connection in the middle of the configuration / setup process.
By using a web browser of your choice and entering the IP address of your RT-AC51U router in the address bar you will load the login screen. You can find the ip address on the back of your router.
Now enter the default username and password of your router and you will be granted access to its admin panel. If you do not happen to know what the username and password is then feel free to lookup some of the default ones for RT-AC51U routers by ASUS.
If you experience problems logging in a RT-AC51U router, then you are probably using the wrong username or password. Do not forget to store the login details after you have reset them.