Router settings can only be accessed from an Internet browser. So this assumes that you have a computer and an internet connection.
Steps
Part 1 of 3: find the address of a router (Windows)

Step 1. Make sure your computer is well connected to the Internet
If this is the case, you will be able to use your computer settings to find the router's address, which will allow you to access the router's settings.
If your wireless connection is not working well, you can connect directly to the router

Step 2. Open the Start menu (

).
Click on the Windows logo in the lower left corner of the screen.

Step 3. Click Settings (

).
Click on the gear icon on the left side of the start menu.

Step 4. Click Network and Internet (

).
The icon is a schematic terrestrial globe streaked with lines.

Step 5. Click View Your Network Properties
This link is almost at the bottom of the page, so you may have to scroll down the page.

Step 6. Write down the number next to Default Gateway
This is the address of the router, which allows online access to the administration page.
Part 2 of 3: Find the address of a router (Mac)

Step 1. Make sure your computer is well connected to the Internet
If this is the case, you will be able to use your computer's settings to find the router's address, which will allow you to access the router's settings.
If your wireless connection is not working well, you can connect directly to the router

Step 2. Open the Apple menu (

).
Click on the Apple logo in the upper left corner of the screen.

Step 3. Click System Preferences
This is the second menu option Apple. A window opens.

Step 4. Click Network
The icon is a globe streaked with white lines on the third preference row.

Step 5. Click Advanced
This button is at the bottom right of the window.

Step 6. Click the TCP / IP tab
It is, at the top of the window, at the far left of the row of tabs.

Step 7. Write down the address next to Router
This is the address of the router, which allows online access to the administration page.
Part 3 of 3: Access Router Settings (Windows and Mac)

Step 1. Run your favorite Internet browser
To access your router's settings, you need an active internet connection.

Step 2. Enter the address of your router
Type the address of the router in the address bar of your browser, then validate with Enter. You will see the router's administration page.

Step 3. Enter your router's username and password
Unless you have changed them, they are standard, generally “admin” (username) and “password” (password).
- To find out the default username and password, read the device's documentation or go to the Internet.
- If the password and username have been changed and you forgot them, then reset your router to factory settings.

Step 4. Find your router's settings
The administration pages vary very slightly from router to router, but the topics are always the same, not necessarily in the same places.
- Settings: under this heading are the password, bandwidth, encryption, authentication method, etc.
- Network name (SSID): it is with this name that all the devices connected to the network communicate with each other.
- Connected devices: this section allows you to find out the devices connected to the network, in particular those which have been connected recently.
- Parental controls: with this section, you will, for example, be able to prohibit certain people on the network from accessing certain sites or limit the duration of use of a particular device.

Step 5. Change the name of your wireless network
To change the name of your wireless network, you must change the name in the field SSID. In doing so, all devices connected to this network will no longer work and will have to be reconfigured with the new name.
This change is made on the router's settings page

Step 6. Protect your wireless network
Routers today offer a variety of ciphers, but WPA2 encryption is currently the most secure.
If you adopt a new password, use one that is hard to break, consisting of numbers, letters (upper and lower case) and special characters. Do not take a master password, such as your date of birth

Step 7. Assign new credentials to your router
This is a username and password. They will be the guarantee of the security of your router with each connection. The default username and password are mundane and easy to crack. It would be reckless and very damaging to let anyone malicious to enter your network, when long and complex credentials would do.