In recent years, owners of smartphones running an operating system Android are increasingly faced with an incomprehensible notification at the top of the screen. The message reads: "The network may be being monitored" or "Traffic may be being monitored." This message appears immediately after connecting to Wi-Fi or a mobile network and causes most users to worry about their personal data. However, there is no need to panic ahead of time, since in most cases this is a standard security feature and not a sign of virus infection.
The appearance of this warning is due to the fact that the security system Android detected interference in network traffic. This can happen for both harmless reasons, for example, when using corporate certificates or third-party ad blocking applications, and in the case of a real threat of data interception by attackers. You can figure out the source of the problem and fix it yourself, without resorting to service centers.
In this article we will analyze in detail the mechanism of operation of this protection, analyze the main reasons for the notification and provide step-by-step guide on how to disable it. You'll learn how to check your DNS settings, remove questionable certificates, and configure your system to display a secure connection status again. Understanding these processes will allow you not only to remove the annoying inscription, but also to really improve the level of digital hygiene of your device.
The nature of the notification and the principle of operation of the protection
Starting with version Android 9 (Pie), Google has introduced a mechanism that constantly monitors the network connection for the presence of a so-called “user certificate” (User). CA). If the operating system sees that traffic is passing through an intermediary who decrypts it for its own purposes, it immediately issues a warning. This is done to protect against Man-in-the-Middle attacks.
Security Certificate is a digital document that confirms the authenticity of a site or server. Under normal circumstances, browsers and applications only trust pre-installed root certificates issued by reputable certificate authorities. When you install a third-party application that requires access to encrypted traffic (for example, an antivirus or ad blocker), it often adds its own certificate to the trusted ones.
⚠️ Warning: If you see this message while connected to a public Wi-Fi network in a cafe or airport, there is a real risk of password interception. In such cases, it is better to refuse to enter confidential data.
The system does not distinguish between the good and evil intentions of the intermediary. For Android any interception of traffic is a potential threat. Therefore, the message “Network may be monitored” appears even if you yourself installed a parental control application or a corporate VPN. The device honestly warns you: “Someone is seeing everything you send and receive.”
To check the threat level, try opening the website of a bank or postal service. If the page loads without SSL certificate errors, the risk is minimal, and the message is caused by local settings.
The influence of third-party applications and ad blockers
One of the most common reasons for the warning to appear is the use of applications that filter Internet traffic. Vivid examples include AdGuard, Blokada or various anti-virus scanners. These apps create a local VPN tunnel on the device through which all traffic is passed to filter out unwanted content and advertising.
To effectively block ads inside other applications, such apps need to decrypt HTTPS traffic. To do this, they install their root certificate on the system. It is this fact that triggers the system warning. The user voluntarily allows the application to “eavesdrop” on the connection in order to block banners, but the security system perceives this as a risk.
- 📱 AdGuard: requires installation of a certificate for HTTPS filtering in browsers and applications.
- 🛡️ Antiviruses: scan network traffic for malicious links in real time.
- 🏢 Corporate clients: control employee access to resources through their own gateways.
- 👨👩👧 Parental Control: limits access to certain categories of sites.
If you consciously use such tools, then the appearance of the inscription is absolutely normal. However, if you have not installed such apps, and the notification appears suddenly, this is a reason to check the list of installed applications. Perhaps some free application secretly installed its certificates without your knowledge.
Private DNS and proxy server settings
Another common source of the problem lies in manual network settings. Many users, in pursuit of Internet speed or bypassing blocking, prescribe alternative DNS servers. If the selected server does not support encryption or uses outdated protocols, the system may regard this as a vulnerability.
In the settings Android there is a “Private DNS” section. By default, it is often set to Auto or Disabled. If the address of a third-party server is registered there (for example, dns.adguard.com), the system understands that requests for domain names go through third parties. Although this increases privacy from the provider, for a local security check it is a signal of interference.
It is also worth checking your proxy settings. If you manually set a proxy server in your Wi-Fi network settings, all your traffic will go through the specified IP address. This is a classic scheme for corporate networks or school computer classes, but for home use it is often unnecessary.
| Parameter | Default value | Risk value | Impact on error |
|---|---|---|---|
| Private DNS | Auto / Disabled | ISP Hostname | High |
| Wi-Fi Proxy | No | Manual settings | Critical |
| Certificates | System | User | Causes an error |
| VPN | Disabled | Third-party client | Average |
To fix the problem with DNS, just return the settings to their original state. Go to Settings → Connection → Other connection settings → Private DNS and select the “Disabled” or “Auto” option. This action will remove the warning if the reason lies here.
How does DNS-over-TLS work?
The DNS-over-TLS protocol encrypts requests to the name server, preventing them substitution. However, if the server does not have the correct certificate, Android will warn the user about this.
Removing user security certificates
The most effective way to remove the “Network can be monitored” message is to completely delete all user certificates from the device’s memory. This procedure is safe for the system, but can disrupt the operation of applications that rely on their certificates (the same ad blockers or corporate email clients).
To perform this operation, you will need to go to the security settings menu. The path may differ slightly depending on the smartphone model (Samsung, Xiaomi, Pixel), but the logic remains the same. You need to find the section responsible for encryption and credentials.
Usually the path looks like this: Settings → Biometrics and security → Other security settings → Trusted credentials. In some shells, this item may simply be called “Encryption and Credentials”. Inside you will see two tabs: “System” and “User”.
☑️ Removing certificates
Click on the “Delete All” button in the user certificates section. The system will ask for confirmation in the form of a PIN code, pattern or fingerprint. Once confirmed, all third-party certificates will be erased and the warning in the status bar will disappear instantly. If after this some important service stops working, you will have to reinstall it and go through the certificate trust procedure again.
⚠️ Attention: Deleting corporate certificates may lead to loss of access to work email or internal company resources. Check with your system administrator before cleaning your work device.
Resetting network settings as a radical solution
If manually deleting certificates and checking DNS did not help, or if you cannot find the necessary items in the menu, you can use the network settings reset function. This action will return all connection settings to factory defaults, deleting saved Wi-Fi networks, Bluetooth pairs and mobile data settings.
This procedure is a rougher tool, but it ensures that all hidden configurations that could have been introduced by malware or erroneous user actions are cleared. Before you begin, be sure to write down the passwords for important Wi-Fi networks, as you will have to enter them again.
Find the section System → Reset settings → Reset Wi-Fi, mobile data and Bluetooth settingsin the settings. On some devices this item is located in the general reset menu. After pressing the confirmation button, the phone will reboot the network modules. The “Network can be monitored” error should disappear as all custom filtering rules will be invalidated.
Resetting network settings does not delete personal files, photos or applications, but it deletes all saved Wi-Fi and paired passwords Bluetooth devices.
After resetting, it is recommended not to install all applications at once. Try working with a “clean” phone for a while. If the error is not returned, then the problem was in one of the previously installed applications. Start installing apps one at a time to identify the culprit.
Checking for malware
In rare cases, the appearance of a warning may indicate a real infection. There are Trojans and spyware that inject themselves into the system and create their own certificates to intercept banking data or messages from instant messengers. If you have not installed any blockers, have not changed the DNS settings and are not using corporate software, but the message appears, this is an alarming sign.
It is recommended to scan the device using reliable antivirus software. Dr.Web, Kaspersky or the built-in scanner Google Play Protecthave proven themselves well. Run a full system scan and carefully study the report. Particular attention should be paid to applications with device administrator rights.
Go to the section Settings → Security → Device administrator applications. There should only be a “Find My Device” service or an antivirus. If you see an unknown application with admin rights there, immediately disable it and delete it. Such apps are often disguised as system processes or icons with names like “System Update” or “Wi-Fi Service”.
What to do if the error does not disappear after all the actions?
If you have reset the settings, We deleted the certificates and checked the phone for viruses, but the message remained, perhaps the problem lies in the firmware. Some custom builds of Android or modified shells from manufacturers may have bugs in displaying network status. In this case, it is worth checking for an official system update or, as a last resort, performing a full reset to factory settings (Hard Reset) with preliminary saving of data.
Is it possible to completely disable this warning forever?
On ordinary devices without root access, it is impossible to disable the verification mechanism, since it is part of the Android security core. However, by removing the reason (certificate or proxy), you will also remove the notification itself. On rooted devices, you can modify system files, but this is highly discouraged due to the risk of reducing overall security.
Does this notification affect Internet speed?
The notification itself does not affect the speed. However, the underlying cause (for example, a slow proxy server or an overloaded DNS) can significantly slow down page loading. Eliminating the cause often leads to faster network operation.
Is it dangerous to use a banking application with this inscription?
It is highly not recommended. If the message is caused by your personal ad blocker certificate, the risk is minimal since you trust the application. But if the reason is unknown, there is a possibility that your logins and passwords could be intercepted. It is better to eliminate the error before financial transactions.
Why is there an error on one Wi-Fi, but not on the other?
This indicates that the problem is not in the phone globally, but in a specific network configuration. Perhaps a proxy is registered in the settings of this particular Wi-Fi point, or this network uses specific certificates for authorization (as in hotels or universities).