192.168.15.1 Login: Access Your Vivo Fibra Router

The IP address 192.168.15.1 is the default admin gateway for Vivo Fibra routers across Brazil, and for a handful of other brands like CyberTAN, D-Link, and Linksys. If the page will not load, or you do not know which username and password to use, this guide walks through the login process, covers the Technicolor quirk that trips up many Vivo customers, and fixes the most common problems.

What Is 192.168.15.1?

192.168.15.1 is a private IP address, which means it works only inside your own network and cannot be reached from the public internet. Your router uses it as the address for its configuration page, where you change the Wi-Fi name and password, manage connected devices, and adjust network settings.

In Brazil, this address belongs almost entirely to Vivo Fibra routers. Vivo supplies units from several manufacturers, and most of them open their settings here. The interface is in Portuguese, so the steps below use the labels you will actually see, such as Configurações, Rede Wi-Fi, and Senha.

How to Log In to Your Router at 192.168.15.1

1. Connect your phone or computer to the router, over Wi-Fi or with a LAN cable. A wired connection is steadier for setup, since changing Wi-Fi settings will not drop your session.
2. Open a web browser such as Chrome, Firefox, Edge, or Safari. Vivo recommends using an anonymous or incognito tab to avoid cached login issues.
3. Click the address bar at the top of the browser, the bar that shows the web address. Do not use the search box in the middle of the page.
4. Type 192.168.15.1 and press Enter. Use digits only. If it does not load, try http://192.168.15.1 with the prefix.
5. Wait for the login page. If the browser warns the connection is not private, click “Advanced” and proceed. Router pages use self-signed certificates that trigger this, and it is safe on your own network.
6. Enter the username (Usuário) and password (Senha). See the table below.
7. Click “Entrar” to reach the configuration page.

Default Username and Password for 192.168.15.1

The right credentials depend on which router Vivo gave you. These are the most common defaults:

Device / Brand	Username (Usuário)	Password (Senha)
Vivo Fibra (most models)	admin	admin
Vivo Fibra (Technicolor)	(leave blank)	admin
CyberTAN	admin	admin
D-Link	admin	(leave blank)
Linksys	admin	admin

If these credentials do not work, your password may have been changed during setup. The Vivo password is also printed on the label (etiqueta) on the underside of the router, alongside the IP address, so check there before anything else.

The Technicolor case deserves special attention because it confuses so many people. On a Vivo router made by Technicolor, you leave the username field empty and enter only “admin” as the password. If admin/admin keeps failing and your router is a Technicolor model, that blank username is almost certainly the fix.

What to Do If You Cannot Log In

The page will not load. Confirm 192.168.15.1 is actually your gateway. A few setups use a different address.

• On Windows: press Windows + R, type cmd, and run ipconfig. Read the “Default Gateway” line.
• On Mac: open Terminal and type netstat -nr | grep default.
• On Android or iOS: open Wi-Fi settings, tap the connected network, and look for the gateway or router field.

Use whatever address appears there instead.

You typed a letter instead of a number

A common slip is “192.168.l5.1” with the letter L. The address is digits only. Retype it carefully as 192.168.15.1.

You got search results

That means the address went into a search engine, not the browser’s address bar. Click the bar at the very top of the window, clear it, type 192.168.15.1, and press Enter.

The login page loads but rejects your password

If your router is a Technicolor model, leave the username blank and use only “admin” as the password. Otherwise try admin/admin and check the label. If nothing works, the password has been changed and a reset may be needed.

You are not connected to the router

192.168.15.1 only resolves when your device is on the router’s network. If your phone slipped to mobile data or another Wi-Fi, the page will not open. Reconnect first.

How to Reset Your Router to Factory Settings

A factory reset erases everything: the Wi-Fi name and password, any custom configuration, and the admin password. The router returns to how it shipped, so reset only when you are locked out and have no other way in.

1. Find the RESET button, usually a small recessed pinhole on the back or bottom of the router.
2. Use a pin or straightened paperclip to press and hold it.
3. Hold for about 5 to 10 seconds. The lights will blink or the router will restart when the reset takes effect.
4. Release and wait one to two minutes for the router to reboot.
5. Log in with the factory defaults from the table above, or the credentials on the label.

A caution for Vivo customers: a reset clears the connection settings that link the router to Vivo’s network. If your internet does not return afterward, contact Vivo support so they can re-provision the router rather than trying to restore it yourself.

How to Change Your Wi-Fi Password at 192.168.15.1

Changing the Wi-Fi key is the most common reason people log in.

1. Log in at 192.168.15.1 with the admin credentials.
2. Open the Menu, then Configurações (Settings).
3. Select Rede Wi-Fi 2.4 GHz or Rede Wi-Fi 5 GHz, depending on which band you want to change.
4. Enter your new Wi-Fi name in the SSID field and your new password in the Senha field.
5. Click Salvar to apply.

After saving, every device drops off the Wi-Fi and reconnects with the new key. If your router broadcasts both 2.4 GHz and 5 GHz, you may need to update each band separately. Pick a password of at least 12 characters with no personal details.

Conclusion

For most users entering 192.168.15.1, the router is a Vivo Fibra unit. In most cases, admin/admin will let you log in, but on Technicolor models the username is usually left blank and the password is “admin”. If the page won’t load, make sure you’re connected to the router and try opening it in an incognito tab. Once you’re in, you can change your Wi-Fi password under “Configurações”. Avoid resetting the router unless necessary, since it will also remove Vivo’s connection settings.