⚠️ Attention: Editing system files, even indirectly, can lead to unstable network operation or blocking access to important services. You perform all actions at your own peril and risk.
Permanent pop-up banners in games or blocking access to certain sites on a smartphone often require editing the system hosts file, however, the standard editing method is impossible without root access, obtaining which will void the device warranty, disrupt the operation of banking applications and create security vulnerabilities.
Fortunately, modern versions of the operating system systems Android and advanced development tools allow you to circumvent this limitation. There are several effective ways to implement the functionality of the hosts file without having to hack the system. In this article, we will examine in detail the methods of using USB debugging, specialized DNS applications and built-in privacy settings.
You will learn how to set up local traffic filtering using standard platform tools and third-party software that does not require deep intervention in memory sections. This solution is ideal for those who want to clear Internet surfing of debris, but are afraid of compromising the integrity of their smartphone’s firmware.
The principle of operation of the hosts file and Android limitations
The file hosts is a simple text table in which the correspondence between IP addresses and domain names is written. When you enter a website address in your browser, the operating system first accesses this file. If a domain is found there, the system uses the specified IP, ignoring requests to external DNS servers. This allows you to redirect traffic, for example, to a local address 127.0.0.1, thereby blocking the loading of advertising servers.
In the ecosystem Android, starting from version 4.0 and higher, the hosts file is located in a protected system partition /system/etc/hosts. By default, this partition is mounted read-only (read-only). Without superuser rights (Root), direct writing of changes to this file is impossible with standard file managers.
However, the system kernel still reads this file when generating network requests. The user's task is to find a way to either replace this file virtually, or use mechanisms that intercept DNS requests before they go online. Modern methods bypass the need to physically change bytes in the system partition.
⚠️ Attention: Settings interfaces and menu item names may differ depending on the manufacturer's shell (MIUI, OneUI, ColorOS). If you do not find the described item, check the official documentation for your model.
Method one: Using the ADB debugging mode
The most reliable way to simulate working with the hosts file without permanent Root access is to use the toolkit Android Debug Bridge (ADB). This method allows you to send commands to the device from your computer, having temporary privileges sufficient to make changes to the network configuration for the current session or through special utilities.
First, you need to activate developer mode on your smartphone. Go to Settings → About phone and quickly click 7 times on the item Build number. After this, a new section will appear in the settings menu For developers, where you need to turn on the toggle switch USB debugging.
Connect your smartphone to your computer with a cable. Google's Platform Tools package must be installed on your PC. Open a command line or terminal in the folder with ADB and enter the command to test the connection:
adb devicesThe phone screen will ask you to allow debugging from this computer. Confirm the action. Now you can use special scripts or assistant applications that apply blocking rules through ADB. There are ready-made projects, such as AdAway in Root-free mode (via a VPN interface) or specialized shell scripts that redirect requests.
- 🔌 Connect your smartphone with an original cable for a stable connection.
- 💻 Install ADB drivers on your personal computer.
- 📱 Allow debugging in a pop-up window on the smartphone screen.
- ⚙️ Use shell commands to apply network rules.
This method requires a computer, but it does not violate the integrity of the system and does not leave traces in the form of modified system files after a reboot, unless you use persistent scripts. This makes it a safe option for testing blocking.
☑️ Preparing to work with ADB
Method two: Private DNS and blocking at the domain level
Starting with version Android 9 (Pie), the system has a native function Private DNS (Private DNS). Although this is not a direct editing of the hosts file, this mechanism allows you to redirect all DNS requests of the device to the server, which automatically filters advertising domains, acting in a similar way.
You do not need to install additional applications or connect a cable. Just go to Settings → Network and Internet → Private DNS. Select mode ISP host name and enter the address of one of the public ad blockers, for example, dns.adguard.com.
After saving the settings, all requests to known ad servers will be blocked at the network level. The effect is identical to writing thousands of lines into the hosts file manually. This method works globally for all applications that use standard Android network libraries.
| DNS Provider | Host Address | Features |
|---|---|---|
| AdGuard DNS | dns.adguard.com |
Blocking ads and trackers |
| DNSCrypt | dns.dnsoverhttps.com |
Encryption of requests, protection from interception |
| NextDNS | configID.dns.nextdns.io |
Flexible configuration through your personal account |
| Control D | p2.freedns.controld.com |
Blocking malware and phishing |
Use Private DNS is the simplest and most energy-efficient solution. However, it is worth considering that some services may not work correctly if their domains accidentally end up in the provider’s blacklist. In this case, the address can be temporarily disabled.
If, after enabling Private DNS, some applications stop working, try changing the provider to one that has less aggressive filters, for example, just dns.quad9.net to protect against threats without blocking ads.
Method three: Applications with local VPN tunnel
Another powerful tool for implementing hosts rules without Root is applications that create a local one. VPN tunnel. They do not send your traffic to remote servers, but process it inside the device, intercepting DNS requests and checking them against the internal database of blocked domains.
Popular solutions such as Blokada, DNS66 or Nebuloload lists hosts lists from the Internet and apply them in real time. When you launch such an application, the system requests permission to create a VPN connection. After confirmation, all traffic passes through the app filter.
The advantage of this method is its flexibility. You can add your own domains to the blacklist, import lists from URLs, and see statistics on blocked requests. In fact, the application creates a virtual hosts file in RAM and uses it for filtering.
- 🛡️ Download a proven open source application (for example, from F-Droid).
- 📥 Allow the creation of a VPN connection in the system dialog.
- 🔄 Update the lists of hosts inside the application to keep the databases up to date.
- ⚡ Add exceptions for trusted sites in the settings.
It is important to understand that with an active local VPN, you will not be able to use other full-fledged VPN services at the same time. The Android system only allows one VPN app to run at a time. This is a kernel level limitation that cannot be bypassed without Root.
Why don't VPN applications send data to the server?
Applications like Blokada use the device's TUN/TAP interface locally. Data packets are intercepted, analyzed for compliance with domain names in the blacklist and either passed further onto the Internet or dropped without leaving your smartphone.
Comparison of methods and selection of the optimal solution
Each of the considered methods has its own advantages and disadvantages, depending on your goals and technical preparation. Direct editing via ADB gives maximum control, but requires a PC and command line knowledge. The Private DNS method is the simplest, but depends on third-party servers.
Applications with local VPN offer a golden mean: they work autonomously, allow fine-tuning and do not require complex manipulations with the computer. However, they may consume a little more battery due to the constant processing of traffic in the background.
If your goal is to block a specific domain one-time, it may be easier to change the settings within the application itself, if such a function is provided by the developer. For global cleaning of the system from advertising, solutions based on DNS filtering.
Possible problems and ways to resolve them
When using blocking methods via hosts or DNS, users may encounter a number of typical problems. The most common of them is the lack of Internet access in certain applications. This happens when a domain required for the service (for example, for analytics or account login) is included in the blocked list.
In such cases, you need to add an exception. In applications like Blokada this is done through the Whitelist tab (White List). If you are using Private DNS, you will have to temporarily disable it or change your provider to a neutral one, such as Google (dns.google).
Another problem is network slowdown. This may be due to the slow response of the DNS server you selected in the Private DNS settings. Try testing several different providers to find the fastest one for your region and telecom operator.
⚠️ Attention: Some banking applications and services with strict security checks may refuse to work when an active VPN tunnel is detected, even a local one. Temporarily disable blockers when making financial transactions.
Frequently asked questions (FAQ)
Do I need to obtain root access for does Blokada or AdGuard work?
No, modern versions of these applications work in local VPN mode, which does not require superuser rights. Root is only needed for the method of directly writing to a system file, which is rarely used now.
Does using Private DNS affect Internet speed?
The impact is minimal and often unnoticeable. High-quality DNS servers can even speed up the opening of pages due to faster name resolution compared to the provider's servers. However, if the connection to the DNS server is poor, there may be a delay.
Is it possible to block advertising on YouTube using these methods?
Regular hosts lists only block banner and text advertising. Video advertising on YouTube is loaded from the same domains that. and basic content, so standard blocking via hosts or DNS is often ineffective for video. This requires specialized clients (NewPipe, Revanced).
Is it safe to trust your traffic to public DNS servers?
When using Private DNS (DoT) mode, your requests are encrypted and your Internet provider does not see which sites you are using. However, the owner of the DNS server sees these requests. Choose trusted companies with a privacy policy, such as AdGuard or Cloudflare.
What to do if after setting the Internet in all applications is lost?
Most likely, the entered Private DNS server address is incorrect or the server is unavailable. data-i="137">or Auto or Off for Private DNS. If you are using a blocker application, check to see if it is stopped in the background.
Using a local VPN or Private DNS is the modern standard for blocking unwanted content, which completely replaces the need to edit the system hosts file manually.