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docs/general/stealth-mode.md

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---
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title: Stealth Mode (Tracking protection)
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title: Tracking protection (formerly Stealth Mode)
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sidebar_position: 4
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---
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Many websites gather information about their visitors, such as their IP address, installed browser and operating system, screen resolution, and even the page from which a visitor was redirected. Some web pages use cookies to mark your browser and save your personal settings and preferences, or to "recognize" you upon your next visit. *Tracking protection* safeguards your personal information from such data- and statistics-gathering systems.
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Many websites gather information about their visitors, including their IP address, installed browser and operating system, screen resolution, and even the page from which they were redirected. Some web pages use cookies to mark your browser and save your settings and preferences, or to "recognize" you upon your next visit. **Tracking protection** safeguards your personal information from such data- and statistics-gathering systems.
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You can flexibly adjust the work of Stealth Mode: for instance, you can prohibit the website from receiving the search request you used to find it on the Internet, automatically delete both third-party and the website's own cookies, turn off browser geolocation sharing that can be used to track your whereabouts, and hide your true IP address or even replace it with an arbitrary one.
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You can adjust the tracking protection settings as needed. For example, you can prevent websites from receiving search engine requests that led you to them. You can automatically delete third-party and first-party cookies. You can also turn off browser geolocation sharing, which can be used to track your location. You can hide your true IP address or replace it with an arbitrary one.
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Below we will list and describe the main features and options that you can control in the **Stealth Mode** settings. They are split into four groups: **General**, **Tracking methods**, **Browser API**, and **Miscellaneous**.
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Below, we will list and describe the main features that you can control in the **Tracking protection** settings. The features are organized into the following sections: **General**, **Tracking methods**, **Browser API**, **Windows tracking**, and **Miscellaneous**.
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:::note
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Some options may not be available depending on the particular product due to OS or other limitations.
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Some features are only available for certain products because of limitations from the operating system or browser.
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:::
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## General {#general}
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### Block trackers {#blocktrackers}
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This feature blocks trackers and web analytics using AdGuard Tracking Protection filter.
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### Remove tracking parameters from URLs {#removetracking}
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If you enable this feature, AdGuard will use the AdGuard URL Tracking filter to remove tracking parameters like `utm_*` and `fb_ref` from page URLs.
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### Hide search queries {#searchqueries}
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When you get directed to a website from Google, Yahoo, or any other search engine, this option hides the search query that you used to find that website.
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This feature hides your searches from websites that you visit via search engine results. For example, when you are sent to a website through a search engine like Google or Yahoo, this feature hides the search query you used to find that website.
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### Send signals to opt out of tracking {#donottrack}
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### Ask websites not to track me {#donottrack}
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Sends the [Global Privacy Control](https://globalprivacycontrol.org/#gpc-spec) and [Do Not Track](https://en.wikipedia.org/wiki/Do_Not_Track) signals to the websites you visit.
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### Remove tracking parameters from URLs {#removetracking}
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### Other privacy filters {#otherprivacyfilters}
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If you enable this option, AdGuard will strip tracking parameters like `utm_*` and `fb_ref` from pages’ URLs.
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This feature displays other privacy filters enabled in **Filters**.
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:::note
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Available in: AdGuard for Android and AdGuard for Windows.
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:::
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### Tracking methods {#tracking-methods}
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## Tracking methods {#tracking-methods}
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### Delete third-party cookies {#3p-cookie}
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Websites use cookies to store your information and preferences, such as the language you selected, your location, or the list of items in your shopping cart. When you return to a website, your browser sends back the cookies belonging to that website, which allows it to "remember" your data.
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This feature prevents advertisers from tracking your behavior across multiple pages by limiting the lifetime of third-party cookies.
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Third-party cookies are those implemented by a website that is different from the one you are currently browsing. For example, cnn.com may have a Facebook "Like" widget on its homepage. This widget will implement a cookie that may be read later by Facebook. Some advertisers use such cookies to track what other sites you visit where their ads are placed.
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Websites use cookies to store your information and preferences, such as the language you selected, your location, or the list of items in your shopping cart. When you return to a website, your browser sends the website your cookies belonging to the website, allowing it to "remember" your data.
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Set a time period (in minutes) at the end of which all third-party cookies will be destroyed. Set the timer to 0 to block them completely.
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Third-party cookies are those implemented by a website that is different from the one you are currently browsing. For example, cnn.com may have a Facebook "Like" widget on its homepage. This widget implements a cookie that Facebook may read later. Some advertisers use such cookies to track what other sites you visit where their ads are placed.
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Set a time period (in minutes) after which all third-party cookies will be deleted. To block these cookies, set their lifetime to 0.
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:::caution
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This setting deletes all third-party cookies, including the information of your logins through social networks or other third-party services. You may have to periodically re-log in to some websites and face other cookie-related issues. To block only tracking cookies, use [*AdGuard Tracking Protection filter*](/general/ad-filtering/filter-policy/#tracking-protection-filter).
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:::
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:::note
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Available in: AdGuard for Android, AdGuard for Windows, AdGuard for Mac, and AdGuard Browser Extension (MV2-based browsers).
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:::
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### Delete first-party cookies (not recommended) {#1p-cookie}
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Set a time period (in minutes) at the end of which all cookies will be destroyed. Set the timer to 0 to block them completely.
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This feature prevents websites from remembering your details, such as your login credentials and language preferences, by limiting the lifetime of first-party cookies.
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Set a time period (in minutes) after which all cookies will be deleted. To block these cookies, set their lifetime to 0.
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:::caution
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We do not recommend enabling this option as it may severely interfere with the work of certain websites.
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We do not recommend enabling this option as it may severely interfere with the work of certain websites. If you block these cookies, some websites may break or stop working.
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:::
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:::note
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Available in: AdGuard for Android, AdGuard for Windows, AdGuard for Mac, and AdGuard Browser Extension (MV2-based browsers).
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### Block ETag and If-None-Match headers {#3p-cache}
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This feature removes the ETag and If-None-Match headers from requests and responses to prevent tracking by them.
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When a browser addresses a page, the server assigns an ETag to that page. This ETag is used by the browser to cache the page's contents. Upon subsequent requests, the browser sends the ETag to the corresponding server, thus letting the server learn the visitor’s identity. As long as the site's files are cached, the ETag is sent every time your browser addresses this site. If the site has embedded content from another server (such as an image or iframe), that server can track your activities without your knowledge.
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:::note
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Available in: AdGuard for Android, AdGuard for Windows, and AdGuard for Mac.
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:::
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### Block third-party Authorization header {#3p-auth}
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"Authorization" header value is cached by the browser, and then is sent alongside every request to that domain. It means that it can be used for tracking purposes just like cookies.
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This feature disables cached authorization data that can be used for tracking. May interfere with the functionality of some browser extensions and websites.
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The "Authorization" header value is cached by the browser and sent alongside every request to that domain. This means it can be used for tracking purposes, just like cookies.
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:::note
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Available in: AdGuard for Android, AdGuard for Windows, and AdGuard for Mac.
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:::
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## Browser API {#browser-api}
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:::note
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Only the **Block WebRTC** feature is available for AdGuard browser extensions. You can find it in the **Miscellaneous** section.
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### Block WebRTC {#webrtc}
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WebRTC (Web Real-Time Communication) is a technology that allows direct streaming of data between browsers and apps. It can let others know your true IP address, even if you use a proxy or VPN.
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Enabling this option can disrupt the work of certain browser applications, such as messengers, chats, cinemas, or games.
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This feature blocks WebRTC that can leak your real IP address even if you use a proxy or VPN.
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WebRTC (Web Real-Time Communication) is a technology that enables direct streaming of data between browsers and apps. However, it can let others know your true IP address, even when using a proxy or VPN.
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:::caution
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Enabling this option can disrupt the work of certain browser applications, such as messengers, streaming platforms, chats, cinemas, or games.
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### Block Push API {#push}
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The Push API enables servers to send messages to web applications regardless of the activity status of your browser. Thus, you may see notifications from various websites even if your browser is hidden in the tray or not launched. Enable this option to block the browser's Push API completely.
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This feature blocks push notifications from websites.
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The Push API enables servers to send messages to web applications regardless of the activity status of your browser. This means that you can see notifications from various websites even when your browser is minimized or closed. Enable this option to block the browser's Push API completely.
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### Block Location API {#location}
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Enabling this option will prevent the browser from sending GPS data that could be used to determine your location, modify your search results, or otherwise influence your web experience.
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This feature prevents websites from detecting your location.
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Enabling this option prevents your browser from sending GPS data that could be used to determine your location, modify your search results, or otherwise influence your web experience.
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### Block Flash {#flash}
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This feature increases protection and speeds up website loading by blocking Flash Player support in browsers.
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The Flash Player plugin has become increasingly vulnerable to such online threats as viruses and hackers; it may also significantly increase website load times. Turning this setting on makes AdGuard block browsers' ability to detect components (such as plugins and ActiveXObject objects) that allow Flash to display content. This effectively means that browsers are unable to support Flash.
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### Block Java {#java}
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This feature disables Java plugins on websites and web services because the API has serious security issues. Does not disable JavaScript.
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Some websites and web services still use the old technology to support Java plugins. The Java plugin API, which is the basis of Java plugins, has serious security flaws. For security purposes, you can disable such plugins. Nevertheless, even if you decide to use the "Block Java" option, JavaScript will still be enabled.
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## Windows tracking {#windowstracking}
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:::note
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These features are only available in AdGuard for Windows.
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### Disable Windows telemetry {#windowstelemetry}
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This feature disables sending technical data about your system and app usage.
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### Turn off Advertising ID {#advertisingid}
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This feature disables Advertising ID to block tracking of your app usage.
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### Disable automatic reporting by Microsoft Defender {#windowsautoreport}
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This feature blocks automatic reporting and sampling of suspected malware.
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### Disable WAP Push message routing service {#wappushrouting}
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This feature disables data collection about Windows component problems.
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## Miscellaneous {#miscellaneous}
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### Hide Referer from third parties {#referer}
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Referer is an HTTP header used in browser-to-server requests. It contains the URL of the request source. When you navigate from one page to another, Referer saves the URL of the initial page. The server that hosts the destination web page often has software that parses Referer and extracts various pieces of information from it. Enabling the *Hide Referer from third-parties* option hides the current website from third-party sites by altering the HTTP header.
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This feature prevents third parties from knowing what websites you visit.
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Referer is an HTTP header used in browser-to-server requests. It contains the URL of the request source. When you navigate from one page to another, Referer saves the URL of the initial page. The server that hosts the destination web page often has software that parses Referer and extracts various pieces of information from it. Enabling the *Hide Referer from third-parties* setting hides the current website from third-party sites by altering the HTTP header.
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You can also set an arbitrary value for Referer by entering it into the *Custom Referer* field. To use default Referer, leave the field blank.
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### Hide User-Agent {#useragent}
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This feature removes identifying information from the User-Agent header.
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When you visit a website, your browser sends its information to the server. It looks like a text line that is part of an HTTP request that begins with "User-Agent:". It usually includes the name and version of the browser, the operating system, and language settings. We cut User-Agent from identifying information so that advertisers cannot obtain it.
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You can also set an arbitrary value for User-Agent by entering it into the Custom User-Agent field. To use default User-Agent, leave the field blank.
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:::note
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Available in: AdGuard for Android, AdGuard for Windows, and AdGuard for Mac.
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### Mask IP address {#ip}
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Stealth Mode cannot hide your IP address. However, we can conceal it so that websites you visit will think you are a proxy. Sometimes this helps, and websites ignore your true IP address.
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This feature tricks websites into believing you are a proxy with the IP address you specify.
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Tracking protection cannot hide your IP address. However, we can conceal it so that websites you visit will think you are a proxy. Sometimes this helps, and websites ignore your true IP address.
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You can set an arbitrary IP address, which you would like others to perceive as yours, by simply entering it into the corresponding field. To use the default IP address, leave the field blank.
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:::note
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Available in: AdGuard for Android, AdGuard for Windows, and AdGuard for Mac.
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### Remove X-Client-Data header {#xclientdata}
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It forbids Google Chrome from sending its version and modification information with requests to Google domains (including Double Click and Google Analytics).
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This feature blocks Google Chrome from sending its version and modifications information to Google domains (including Double Click and Google Analytics).
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Available in: AdGuard for Android, AdGuard for Windows, AdGuard for Mac, and AdGuard Browser Extension (Chromium-based browsers).
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### Protect against DPI {#dpi}
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This feature modifies your outgoing traffic so that your ISP’s Deep Packet Inspection systems can’t detect the websites you visit. Can’t guarantee complete protection against all DPI systems
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The Deep Packet Inspection is a system of deep analysis and filtering of traffic by packet content, as well as the accumulation of statistical data. Using this technology, ISPs have the ability to control the passing traffic and limit access to content for their clients.
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AdGuard can modify outgoing packet data so that the client does not fall under the DPI blocking criteria. This means that by enabling this option, users can get access to the content they want. Not all DPI systems can be bypassed at this time, but we are constantly working to improve this.
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The "Protect from DPI" feature is already implemented in AdGuard for Windows, AdGuard for Mac, and AdGuard for Android.
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:::note
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Available in: AdGuard for Android, AdGuard for Windows, and AdGuard for Mac.
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