All the companies listed here offer recursive DNS services.

The ones that are used by most individuals and small companies (and that are covered here) are called recursive DNS and are the default services provided by most Internet Service Providers (ISPs). There are two main types of DNS servers: recursive and authoritative. The process of converting the domain name to its IP address is called domain-name resolution. Each time you type a site name into the browser, DNS is queried for the IP address corresponding to that particular domain, so the browser can contact the Web server to get the content. You utilize the Domain Name System (DNS) every time you surf the Web.

This article describes five of these services. DNS services provide a mix of tools to customize what content is filtered and which sites are blocked, among other useful features. It can also help stop users’ browsing to malware and phishing sites, block intrusive advertising, and serve as adult-content filters.īecause the Domain Name System (DNS) enables individual computers to reach destinations on the internet, services that filter out dangerous or unwanted sites can improve overall network security. Note: You should only use a DNS server you trust.Firewalls and antivirus can help block internet-based malware from infecting connected enterprise machines, but layering on DNS-based filtering can help avoid some of these threats in the first place. Anyone using this service will need to move to another provider. Norton is retiring their ConnectSafe DNS service in November 2018. RETIRED - Norton ConnectSafe (Moderate & Strict)

There are several options of publicly accessible DNS servers that offer content filtering and/or ad blocking.ĭNS based filtering often lacks the level of customization that an installed filtering application offers, but is generally a high performance solution and can be used on routers to filter all devices that connect to your WiFi.īelow are some server options and the categories they filter.

Adguard dns filter