Thankfully it’s a quick fix
People using ASUS routers with ASUS AiProtection found themselves unable to connect to the Internet due to a rogue update of ASUS servers. You may be wondering how an ASUS server update will affect remote router connectivity, and you are correct. Her ASD feature on ASUS routers communicates with Trend Micro to keep you up to date with current threats that roam the internet and block suspicious traffic from reaching your home network. Possibly an improper update is flagging all traffic as malicious and causing loss of connectivity.
The fix is pretty easy for most people, and it’s also a good habit to form. Reboot your router and everything should be fine. If the connection is still not restored, try a firmware update or perform a hard reset. All configuration settings will be lost, but you will pay a small fee to get your cat videos back. Simply press and hold her RESET button on the device for 5-10 seconds to get it up and running again. If the issue persists, follow the link on Bleeping Computer for instructions on contacting ASUS to reroute packets to the router.