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Quad9 is a free service that replaces your default ISP or enterprise Domain Name Server (DNS) configuration. When your computer performs any Internet transaction that uses the DNS (and most transactions do), Quad9 blocks lookups of malicious host names from an up-to-the-minute list of threats.
- Service
Quad9 is a free, recursive, anycast DNS platform that...
- News
Quad9 is a global DNS service that offers enhanced...
- Support
Support. Check-out our set up guides and the FAQ, or use the...
- About
Quad9 is a free, recursive, anycast DNS platform that...
- Addresses & Features
The app includes other features such as a full log of DNS...
- Threat blocking
Threat Blocking. Quad9 has integrated both commercial and...
- Privacy
Quad9 is a nonprofit organization, with no commercial...
- Locations
Quad9 systems are distributed worldwide in more than 200...
- Service
13 maj 2020 · W przeciwieństwie do innych alternatywnych systemów DNS, Quad9 obsługuje tylko jeden w pełni bezpieczny adres serwera DNS (na przykład Google Public DNS używa wersji 8.8.8.8 jako podstawowej, a 8.8.4.4 jako drugiej).
Quad9 – darmowy serwer DNS udostępniany przez organizację Global Cyber Alliance oraz IBM. Usługa DNS Quad9, poza standardowym działaniem, dodatkowo sprawdza domeny internetowe w bazie danych IBM X-Force pod kątem analizy zagrożeń i automatycznie blokuje domeny stron udostępniających złośliwe oprogramowanie [2] .
You would have to check their website to see what they filter. DNSSEC is a method of authentication to validate that the reply is correct and unaltered (and was as sent from the upstream server). ECS is fully explained on that page, down below where you have taken the screen shot:
Quad9's 9.9.9.11 service supports ECS. EDNS Client Subnet (ECS) allows Quad9 to send a portion of your IP address to authoritative name servers, which helps major content providers (CDNs), such as Google, Microsoft, etc, accurately determine your geolocation.
9 wrz 2011 · Check the IPs of Free Public DNS Servers by Quad9. Configure your network settings to use the DNS Server IP addresses to get fast and smooth Internet browsing.
Quad9 operates recursive name servers for public use at the twelve IP addresses listed below. These addresses are routed to the nearest operational server using anycast routing. Quad9 supports DNS over TLS over port 853, [ 32 ] DNS over HTTPS over port 443, [ 33 ] and DNSCrypt over port 8443.