What are the advantages and disadvantages of OpenDNS?

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  • 1 decade ago
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    What is OpenDNS?

    OpenDNS was launched in July 2006 by hacker/entrepreneur David Ulevitch. It received venture capital funding from Minor Ventures, which is led by CNET founder Halsey Minor.

    On July 10, 2006, the service was covered by digg[1], Slashdot[2], and Wired News[3], which resulted in an increase of DNS requests from just over one million requests on July 9 to 30 million on July 11.[4].

    On October 2, 2006, OpenDNS launched Phishtank, an online collaborative anti-phishing database.

    In 2006, OpenDNS began using the DNS Update API from DynDNS to handle updates from users with dynamic IPs.[5]

    Since January 2007, OpenDNS provides geographically distributed servers in Seattle, Palo Alto, New York, Washington, D.C., London, with planned expansions to Chicago and Hong Kong.

    On June 11th, 2007, OpenDNS started advanced web filtering to optionally block adult content for their free accounts.

    [edit] Services

    OpenDNS offers DNS resolution for consumers and businesses as an alternative to using their Internet service provider's DNS servers. By placing company servers in strategic locations and employing a large cache of the domain names, DNS queries are usually processed much more quickly[6], thereby increasing page retrieval speed. DNS query results are sometimes cached by the local operating system and/or applications, so this speed increase may not be noticeable with every request, but only with requests that are not stored in a local cache.

    Other features include a phishing filter and typo correction (for example, typing wikipedia.og instead of wikipedia.org). By collecting a list of malicious sites, OpenDNS blocks access to these sites when a user tries to access them through their service. OpenDNS recently launched Phishtank, where users around the world can submit and review suspected phishing sites.

    A screenshot of a 'phishing blocked' page

    A screenshot of a 'phishing blocked' page

    OpenDNS is not, as its name might seem to imply, open source software.

    OpenDNS earns a portion of its revenue by sending the user to an OpenDNS search page when a domain name that he has entered is not valid. Advertisements are displayed on this search page to help fund the operations of OpenDNS. While this behavior is similar to VeriSign's previous Site Finder, OpenDNS states that it is not the same, as OpenDNS is purely an opt-in service (compared to Site Finder's effect on the entire Internet, as VeriSign is an authoritative registry operator)[7] and that the advertising revenue pays for the customized DNS service[8].

    According to OpenDNS, additional services that run on top of its enhanced DNS service will be provided, and some of them may cost money[8].

    One example of such an added service was the company's April 22, 2007 launch[9] of "shortcuts", letting users make custom DNS mappings, such as mapping "mail" to "mail.yahoo.com". This feature launch was covered by a large number of publications, including the New York Times[10], Wired[11], and PC World[12].

  • Anonymous
    4 years ago

    Opendns Advantages

  • Anonymous
    1 decade ago

    OpenDNS is a free service that offers you with addresses of its free DNS servers that .... Each of those tools have their own advantages and disadvantages. ...

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