Pathway
ISP ---- ONU/MoDem ---- WiFi ~~~~ Devices

Configure your router to access the Internet
What to prepare
- A PC with Windows OS
- An Ethernet cable
- Your router (and the router's username and password)
- Your ISP's username and password

1. Connect your PC and router with an Ethernet cable.
2. Open Command Prompt (CMD.EXE) on your PC.
3. Type ipconfig
4. Find the IP address (e.g., 192.168..) of the Default Gateway.
5. Open a web browser (e.g., Edge, Internet Explorer, Chrome, Firefox, Vivaldi or..)
6. Enter the IP address of the Default Gateway in the address bar of your web browser.
And press the Enter key.
7. Log in to the router with your router's username and password (NOT your ISP's username and password).
8. Store your ISP's username and password on your router.
9. Log out from your router.
10. Use a web browser to make sure your PC is connected to the Internet.

Remarks:
The username and password for your router are usually found on the router itself.
Recommend that you change the default password for your router.
If you have forgotten your router's credentials, you
should restore your router to its factory settings
as described in the instructions.

ISP i.e., Internet Service Provider

Sudden loss
The other day, I suddenly lost Internet access from my home PC.
It was not restored after restarting the PC.
So, I tried the following method and the Internet connection was restored.

IMPORTANT
If you decide to try any of the following methods, please do so at your own risk.

1. Switch off the PC.
2. Unplug the router and wait for 5 minutes.
3. Plug the router back in and wait for it to reboot.
4. Then switch the PC back on and try to connect to the Internet.

In my personal experience, this has restored my Internet connection.