AdGuard

AdGuard Home acts as a recursive DNS resolver, which prevents most advertisements from displaying by responding with an invalid address for domains that appear in its filter lists.

The browser extension blocks video ads, interstitial ads, floating ads, pop-ups, banners, and text ads.Eric Griffith [https://www.pcmag.com/feature/359099/the-18-best-firefox-quantum-extensions "The 18 Best Firefox Quantum Extensions"] {{Webarchive|url=https://web.archive.org/web/20190922012404/https://www.pcmag.com/feature/359099/the-18-best-firefox-quantum-extensions |date=September 22, 2019 }}, PC Magazine, February 12, 2018 It is also able to handle anti-AdBlock scripts.James A. Martin [https://www.computerworld.com/article/3214474/web-browsers/the-best-google-chrome-extensions.html "The best Google Chrome extensions"] {{Webarchive|url=https://web.archive.org/web/20181203202702/https://www.computerworld.com/article/3214474/web-browsers/the-best-google-chrome-extensions.html |date=December 3, 2018 }}, Computerworld, August 10, 2017 AdGuard blocks spyware and warns users of malicious websites. AdGuard Content Blocker is an additional browser extension for Yandex Browser and Samsung Internet, which uses Content Blocker API. It downloads filter list updates and requests browsers to enforce them via Content Blocker API.{{Cite web |title=AdGuard Content Blocker {{!}} Overview {{!}} AdGuard |url=https://adguard.com/en/adguard-content-blocker/overview.html |access-date=2023-11-19 |website=adguard.com |language=en}}

AdGuard has Windows and Mac versions,{{cite web |last1=Hougen |first1=Aleksander |title=The 8 Best Ad Blockers That Play Nice With Chrome, Safari, Firefox in 2020 |url=https://www.cloudwards.net/best-pop-up-blockers/ |website=Cloudwards |publisher=Cloudwards.net |access-date=2020-12-08 |archive-date=January 11, 2021 |archive-url=https://web.archive.org/web/20210111070634/https://www.cloudwards.net/best-pop-up-blockers/ |url-status=live }} as well as native mobile versions for Android{{cite web |last1=Painter |first1=Lewis |title=Best ad blocker for iPhone & iPad |url=https://www.macworld.co.uk/feature/best-ad-blocker-for-iphone-ipad-3665858/ |website=MacWorld |publisher=IDG Communications Ltd |access-date=8 December 2020 |archive-date=November 12, 2020 |archive-url=https://web.archive.org/web/20201112023835/https://www.macworld.co.uk/feature/best-ad-blocker-for-iphone-ipad-3665858/ |url-status=live }} and iOS. The application can set up a local VPN, filtering all traffic on the mobile device.{{Citation needed|date=May 2024}}

AdGuard operates recursive name servers for public use. AdGuard DNS supports encryption technologies, including DNSCrypt, DNS over HTTPS, DNS over TLS, and DNS over QUIC.{{cite web |last1=Vasily Bagirov |title=AdGuard becomes the world's first public DNS-over-QUIC resolver! |work=AdGuard Blog |url=https://adguard.com/en/blog/dns-over-quic.html |publisher=AdGuard |archive-url=https://archive.today/20201216061232/https://adguard.com/en/blog/dns-over-quic.html |archive-date=December 16, 2020 |language=en |date=2020-12-15 |access-date=December 18, 2020 |url-status=live }} AdGuard began testing DNS service back in 2016, and officially launched it in 2018.{{Cite web|date=2018-12-29|title=AdGuard officially releases its own DNS service, and it works with Android Pie|url=https://www.androidpolice.com/2018/12/29/adguard-officially-releases-its-own-dns-service-and-it-works-with-android-pie/|access-date=2020-11-02|website=Android Police|language=en-US|archive-date=August 1, 2019|archive-url=https://web.archive.org/web/20190801170106/https://www.androidpolice.com/2018/12/29/adguard-officially-releases-its-own-dns-service-and-it-works-with-android-pie/|url-status=live}}

During late 2014, the distribution of AdGuard's app for Android was removed from Google Play. It has since been made available for download from the developers’ own website.Daria Magdik [https://adguard.com/en/blog/google-removes-adguard-android-app-google-play.html "Google Removes Adguard App From Google Play"] {{Webarchive|url=https://web.archive.org/web/20200501183519/https://adguard.com/en/blog/google-removes-adguard-android-app-google-play.html |date=May 1, 2020 }}, AdGuard News, November 25, 2014

From the summer of 2018 to the summer of 2019, AdGuard for iOS received no updates{{Cite web |last=Orr |first=Andrew |date=2018-09-20 |title=Apple Won't Say Why It Blocked AdGuard and Freedom |url=https://www.macobserver.com/news/adguard-freedom-blocked/ |access-date=2023-05-07 |website=The Mac Observer |language=en-US}}{{Cite web |last=Raj |first=Abhishek |date=2019-06-05 |title=How to block ads on iPhone & iPad? Tips that work in 2022 |url=https://buddinggeek.com/block-ads-on-iphone-ipad-free/ |access-date=2023-05-07 |website=Budding Geek |language=en-US}}{{Cite web |url=https://adguard.com/en/blog/adguard-pro-is-back.html |title=AdGuard Pro for iOS is back from the dead! |access-date=July 27, 2019 |archive-date=July 27, 2019 |archive-url=https://web.archive.org/web/20190727071651/https://adguard.com/en/blog/adguard-pro-is-back.html |url-status=live }} due to Apple policies at the time against ad blocking via the iOS VPN APIs.

In September 2018, AdGuard was hit by credential stuffing attack. AdGuard claims that their servers were not compromised and instead attackers used credential pairs reused by victims on other sites and stolen from those other sites. According to company spokesperson, they "do not know what accounts exactly were accessed by the attackers", so the company had reset passwords for all accounts "as a precautionary measure". Also, AdGuard pledged to use "Have I Been Pwned?" API to check all new passwords for appearance in known public data leaks. Furthermore, they implemented more strict password security requirements.{{Cite web |last=McNamara |first=Tom |date=2018-09-21 |title=All AdGuard ad blocker account passwords have been reset to fight off hackers |url=https://download.cnet.com/blog/download-blog/all-adguard-ad-blocker-account-passwords-have-been-reset-to-fight-off-hackers |website=CNET |archive-url=https://web.archive.org/web/20181204005746/https://download.cnet.com/news/all-adguard-ad-blocker-account-passwords-have-been-reset-to-fight-off-hackers/ |archive-date=4 December 2018 |url-status=dead}}

In November 2020, Microsoft Edge Store and Chrome web store{{cite news |last1=Domanski |first1=Harry |title=Google has kicked five malicious ad blockers off the Chrome Store |url=https://www.techradar.com/news/google-has-kicked-five-malicious-ad-blockers-off-the-chrome-store |work=TechRadar |date=19 April 2018 |language=en}} were infiltrated with fraudulent add-ons posing as various legitimate VPN browser add-ons, including NordVPN and AdGuard's VPN add-on.Dan Goodin [https://arstechnica.com/gadgets/2020/11/fraudulent-add-ons-infiltrate-the-official-microsoft-edge-store/ "Abusive add-ons aren’t just a Chrome and Firefox problem. Now it’s Edge’s turn"] {{Webarchive|url=https://web.archive.org/web/20201209050208/https://arstechnica.com/gadgets/2020/11/fraudulent-add-ons-infiltrate-the-official-microsoft-edge-store/ |date=December 9, 2020 }}, ArsTechnica, November 21, 2020 Subsequently, Microsoft and Google were alerted and actions were taken to remove the fake add-ons in the various browser stores.{{cite web |title=These VPN extensions are imposters that hijack your browser's search |url=https://www.komando.com/security-privacy/imposter-vpn-extensions/765938/ |website=Komando.com |date=24 November 2020 |last1=Gelinas |first1=James }}

AdGuard developers have taken up research in order to inform wider audiences on user privacy, cybersecurity and data protection. The following issues are cases involving the developers:

• Websites involved in crypto jackingMichael Kan [https://uk.pcmag.com/news-analysis/92222/why-hackers-love-cryptocurrency-miner-coinhive "Why Hackers Love Cryptocurrency Miner Coinhive"] {{Webarchive|url=https://web.archive.org/web/20181203202742/https://uk.pcmag.com/news-analysis/92222/why-hackers-love-cryptocurrency-miner-coinhive|date=December 3, 2018}}, UK.PCMag, November 29, 2017Anthony Cuthbertson [https://www.newsweek.com/500-million-pcs-secretly-mining-cryptocurrency-research-bitcoin-683982 "Over 500 Million PCs Are Secretly Mining Cryptocurrency, Researchers Reveal"] {{Webarchive|url=https://web.archive.org/web/20181101192414/https://www.newsweek.com/500-million-pcs-secretly-mining-cryptocurrency-research-bitcoin-683982|date=November 1, 2018}}, Newsweek, October 13, 2017Charlie Osborne [https://www.zdnet.com/article/500-million-pcs-are-being-used-for-stealth-cryptocurrency-mining-online/ "500 million PCs are being used for stealth cryptocurrency mining online"], Zero Day, October 13, 2017
• Facebook Ad Network widespread distributionMatthew Hughes [https://thenextweb.com/facebook/2018/03/26/facebook-tracking-present-41-popular-android-apps "Facebook tracking is present in 41% of the most popular Android apps"] {{Webarchive|url=https://web.archive.org/web/20190201055803/https://thenextweb.com/facebook/2018/03/26/facebook-tracking-present-41-popular-android-apps/|date=February 1, 2019}}, Thenextweb.com, March 23, 2018Nadeem Sarwar [https://beebom.com/deletefacebook-tracking-through-apps "Is #DeleteFacebook Enough? Here’s the Harsh Truth About Facebook Tracking Through Apps"] {{Webarchive|url=https://web.archive.org/web/20200924115831/https://beebom.com/deletefacebook-tracking-through-apps/|date=September 24, 2020}}, Beebom.com, March 27, 2018
• Alerting or reporting of fake ad blockersCal Jeffrey [https://www.techspot.com/news/74243-adguard-reports-20-million-chrome-users-have-malware.html/ "AdGuard reports that 20 million Chrome users have malware infected ad blockers"] {{Webarchive|url=https://web.archive.org/web/20180624184219/https://www.techspot.com/news/74243-adguard-reports-20-million-chrome-users-have-malware.html|date=June 24, 2018}}, Techspotl.com, April 19, 2018.Harry Domanski [https://www.techradar.com/news/google-has-kicked-five-malicious-ad-blockers-off-the-chrome-store "Google has kicked five malicious ad blockers off the Chrome Store"] {{Webarchive|url=https://web.archive.org/web/20181012191733/https://www.techradar.com/news/google-has-kicked-five-malicious-ad-blockers-off-the-chrome-store|date=October 12, 2018}}, Techradar.com, April 19, 2018.
• Popular Android and iOS app privacy issuesRei Padla [https://androidcommunity.com/go-keyboard-apps-sends-users-data-to-servers-and-third-parties-adguard-says-20170923 "GO Keyboard apps sends users’ data to servers and third parties, AdGuard says"] {{Webarchive|url=https://web.archive.org/web/20181203152127/https://androidcommunity.com/go-keyboard-apps-sends-users-data-to-servers-and-third-parties-adguard-says-20170923/|date=December 3, 2018}}, AndroidCommunity.com, September 23, 2017Adarsh Verma [https://fossbytes.com/11-million-android-chrome-ios-users-big-star-labs-spyware "11 Million Android, iOS, Chrome, And Firefox Users Infected By Spyware: Delete These Apps Now"] {{Webarchive|url=https://web.archive.org/web/20181203152143/https://fossbytes.com/11-million-android-chrome-ios-users-big-star-labs-spyware/|date=December 3, 2018}}, Fossbytes.com, July 26, 2018Wagas Amir [https://www.hackread.com/popular-android-ios-apps-browser-extensions-collecting-highly-personal-user-data "Popular Android/iOS apps & Extensions collecting highly personal user data"] {{Webarchive|url=https://web.archive.org/web/20181203060015/https://www.hackread.com/popular-android-ios-apps-browser-extensions-collecting-highly-personal-user-data|date=December 3, 2018}}, Hackread.com, July 26, 2018Catalin Cimpanu [https://www.bleepingcomputer.com/news/security/chrome-extensions-android-and-ios-apps-caught-collecting-browsing-data "Chrome Extensions, Android and iOS Apps Caught Collecting Browsing Data"] {{Webarchive|url=https://web.archive.org/web/20190819100035/https://www.bleepingcomputer.com/news/security/chrome-extensions-android-and-ios-apps-caught-collecting-browsing-data/|date=August 19, 2019}}, BleepeingComputer.com, July 25, 2018

{{Portal|Internet

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• AdBlock
• Adblock Plus
• uBlock Origin
• AdAway
• Pi-hole

{{reflist}}

Category:Ad blocking software

Category:Android (operating system) software

Category:Google Chrome extensions

Category:IOS software

Category:Privacy software

Category:2009 software

Category:Free and open-source software

Category:Shareware

Category:Free Firefox WebExtensions

Category:Alternative Internet DNS services