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OpenDNS

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description OpenDNS Overview

OpenDNS, now owned by Cisco, is a veteran in the DNS space. It is best known for its robust parental controls and content filtering capabilities, which have been refined over many years. It is a popular choice for families and small businesses that need to restrict access to specific types of content across their network. While it may not be the fastest provider on the market, its reliability and comprehensive management tools make it a staple for those who prioritize control and safety over raw speed.

help OpenDNS FAQ

Is OpenDNS now owned and operated by Cisco?

Cisco acquired OpenDNS in 2015 and rebranded its enterprise security products as Cisco Umbrella. The OpenDNS name remains for consumer products such as its home DNS offerings. [Cisco OpenDNS history](https://umbrella.cisco.com/opendns-cisco-umbrella)

What DNS addresses does OpenDNS FamilyShield use?

OpenDNS FamilyShield uses 208.67.222.123 and 208.67.220.123. The standard OpenDNS resolvers are 208.67.222.222 and 208.67.220.220. [Cisco FamilyShield instructions](https://www.cisco.com/c/en/us/support/docs/security/umbrella/225803-understand-opendns-familyshield.html)

How does OpenDNS FamilyShield parental filtering work?

FamilyShield uses predefined DNS category settings to block domains commonly classified as adult content. Because it works at the DNS layer, it is not the same as a full firewall or proxy and can be bypassed by changing DNS, using a VPN, or using browser DNS-over-HTTPS. [Cisco FamilyShield explanation](https://www.cisco.com/c/en/us/support/docs/security/umbrella/225803-understand-opendns-familyshield.html)

Will OpenDNS filtering work on a phone using cellular data?

A router-level OpenDNS setup only covers devices that use that router for DNS resolution. A phone on cellular data, a VPN, or browser DNS-over-HTTPS can use a different DNS path and bypass the FamilyShield addresses. [Cisco FamilyShield limitations](https://www.cisco.com/c/en/us/support/docs/security/umbrella/225803-understand-opendns-familyshield.html)

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