Changing the password on your home Wi-Fi router is a basic digital hygiene procedure that should be performed regularly. Users often need to restrict access to their network or simply update security information, especially if the equipment is shared. ByFly or PromsvyazDevice owners MT PON AT-4 and similar models know that default factory passwords are too easy to guess, leaving the network vulnerable to attack.
Changing the access key doesn't require in-depth technical knowledge, but it does require attention to interface details. In this article, we'll walk you through a step-by-step procedure for popular equipment models used by providers. You'll learn how to properly log into the control panel, select a secure encryption key, and save settings to ensure internet access for connected devices.
It's worth noting that the web configurator interface may differ slightly depending on your device's firmware version. However, the general menu logic remains the same for most routers in the series. PON And AT-4The main thing is to have physical access to the device and, preferably, a computer or laptop connected via cable to avoid losing connection when changing wireless network settings.
Preparing to change security settings
Before changing your password, make sure your device (laptop, PC, or smartphone) is connected to the router. It's best to use a wired connection via a LAN port, as changing WiFi settings will disconnect the wireless connection to the router, potentially losing access to the settings. If a cable connection isn't possible, make sure you have a backup device to log in to if your current one is disconnected.
You will also need credentials to log into the admin panel. For equipment ByFly And Promsvyaz Standard login and password combinations are often used. This is usually admin/admin or user/userThis information is often written on a sticker located on the bottom of the router case. MT PON AT-4 or on the back panel.
⚠️ Note: If you have previously changed your router settings password and have forgotten it, you will need to perform a full reset of the device to factory settings, which will delete all current provider configurations.
Make sure your device's network settings are set to obtain an IP address automatically. A manually assigned static IP address may conflict with the router's address if it's on a different subnet, making it impossible to access the control panel.
Login to the router control panel
Open any modern browser (Chrome, Firefox, Opera) and enter your router's IP address in the address bar. For most models MT PON AT-4 and devices ByFly the standard address is 192.168.1.1In some cases, especially on older firmware versions Promsvyaz, the address can be used 192.168.100.1The exact address is also indicated on the sticker under the body.
After entering the address, press Enter. The browser will prompt you for authorization. Enter your username and password. If the default combinations don't work, your ISP may have set their own unique credentials, which should be included in your service contract. Don't confuse your WiFi password with the password for accessing your router settings—they are two different keys.
If the page doesn't load, check that the cable is properly connected and that the LAN indicator is lit. Also, try opening the website in incognito mode to rule out the browser cache or conflicting extensions. Sometimes antivirus software can block access to local control addresses.
What should I do if the settings page doesn't open?
Check if you have a proxy server enabled in your browser. Go to your Windows or macOS network settings and ensure that a proxy isn't being used for local addresses. Also, try temporarily disabling your firewall or antivirus software, as they may detect local logins as suspicious activity.
Find the Wireless Network (WLAN) section
After successful authorization, you will see the main menu. Router interfaces MT PON AT-4 They may look different, but the structure is usually the same. You need to find the tab or section responsible for the wireless network. Look for the names WLAN, Wireless, WiFi or Wireless network.
This section often contains a submenu. We're interested in the item related to basic settings or security. It might be called Security, WLAN Security, Security or Encryption settingsThis is where the password change field is located.
Please pay attention to the security protocol version. For modern networks, it is recommended to select WPA2-PSK or WPA3, if the equipment Promsvyaz or ByFly This is supported. Older protocols like WEP and WPA are no longer considered secure and can slow down connection speeds.
Setting a new password and choosing encryption
In the window that opens, find the field Pre-Shared Key, Passphrase or PasswordYou'll need to enter a new character combination. It's recommended to use at least 12 characters, including uppercase and lowercase letters, numbers, and special characters. This will significantly make brute-force password guessing more difficult.
Don't use obvious combinations like date of birth, phone number or sequence 12345678. Routers MT PON AT-4 You can use almost any character, but it's best to avoid spaces and characters that are difficult to enter on a mobile phone if you plan to have guests frequently.
- 🔐 Use mnemonic phrases, such as,
MoyDom_2026!- It's easy to remember, but hard to hack. - 📱 Avoid using Cyrillic if you have older devices or game consoles that may incorrectly display Russian letters in passwords.
- 🔄 Change your password at least once every six months, especially if your network is ByFly Many temporary devices were connected.
After entering a new value, be sure to press the button Save, Apply or Apply. The router may warn you that the connection will be terminated. This is normal, as old encryption keys become invalid immediately.
Saving settings and reconnecting devices
After pressing the save button the router Promsvyaz or ByFly The wireless network module will reboot. At this point, all devices connected via WiFi will lose connection. Don't panic; this is normal. After 10-20 seconds, the network will reappear with a new name, or the same name with an updated access key.
Now take your smartphone or laptop and find your home network in the list of available networks. When you try to connect, the system will ask for a new password. Enter the password you just created. If the connection is successful and the internet is back online, then the procedure was completed correctly.
Don't forget to update the password on all other devices: TVs Smart TV, tablets, smart speakers, and CCTV cameras. They will attempt to connect with the old key and may overload the router with constant authentication attempts.
☑️ Verification after changing your password
Standard Login Data Table
For quick access to settings for various equipment models, use the table below. Data may vary depending on the specific firmware version installed by your provider.
| Model / Brand | IP address | Login | Password |
|---|---|---|---|
| MT PON AT-4 | 192.168.1.1 | admin | admin |
| Promsvyaz (old) | 192.168.100.1 | admin | 1234 |
| ByFly (ZTE/Fiberhome) | 192.168.1.1 | user | user |
| Promsvyaz (new) | 192.168.1.1 | admin | admin |
If none of the combinations work, check the sticker on the bottom of the device. Providers often affix stickers with unique data for each subscriber. You can also find this information in your contract or personal account on the operator's website.
Common problems and their solutions
Sometimes, after changing the password, devices don't see the network or can't connect. This may be because the device has an old network profile saved. Try forgetting the network in your device's WiFi settings and reconnecting using the new key.
Another common problem is the router getting stuck. MT PON AT-4If the internet connection disappears after changing the settings and doesn't reappear even after reconnecting, reboot the router using the power button or by unplugging the power cord for 10 seconds. This will clear any temporary errors from the device's memory.
⚠️ Attention: On some router models ByFly After changing the WiFi password, you may need to re-authorize via PPPoE if the settings were reset. Make sure the internet login and password provided by your ISP are saved in the WAN section.
If you find that the password field is grayed out, your account may not have administrator rights. In this case, you need to use a login with superuser rights (often telecomadmin / admintelecom for ZTE, but it depends on the model), or contact technical support.
Additional network security measures
In addition to changing the password, it is recommended to disable the function WPS in the router settings. This technology allows you to connect to the network with the simple press of a button, but it has known vulnerabilities that allow attackers to recover the password in a matter of hours. In the interface Promsvyaz or ByFly This option is often enabled by default.
It is also worth checking the list of connected clients in the section Status or StateIf you see unfamiliar devices there, immediately change your password and enable MAC address filtering. This will allow you to whitelist only your trusted devices.
Update your router firmware regularly. Manufacturers MT PON and other vendors are releasing updates that patch security holes. You can check in the section Maintenance or System tools.
⚠️ Note: Interfaces and menu item names may vary depending on your router's firmware version. If you don't find an exact match, search for synonyms or consult your ISP's official documentation.
What should I do if I forgot my new WiFi password?
If you have forgotten the password you just set, you will have to either look it up in the settings of an already connected computer (via the wireless network properties in Windows), or reset the router to factory settings using the button ResetAfter the reset, you'll have to reconfigure your internet (PPPoE, VLAN, etc.), so it's best to write down the new passwords.
Is it possible to change the password through the app on the phone?
Yes, if your provider ByFly or Promsvyaz Provides a proprietary router management app, or if you use third-party administration apps (such as Fing or dedicated utilities for specific router models), you can connect to WiFi. However, using a PC browser is more reliable.
Does a complex password affect internet speed?
No, password complexity (number of characters, special characters) does not affect data transfer speed. Speed depends on your provider's plan, signal quality, channel congestion, and router specifications. MT PON AT-4The only requirement is that the password must comply with the encoding standard (usually ASCII).
Do I need to change the router admin password?
Yes, this is critically important. The default password admin Every hacker knows this. If you don't change the password for the web interface (192.168.1.1), an attacker who gains access to your network will be able to completely take over control of the router, redirect traffic, or steal data.
Why doesn't the router save the new password?
This could be due to full device memory or a firmware error. Try rebooting the router before making changes. If the issue persists, you might need to update the device's firmware via the "Firmware" section. Administration -> Upgrade.