<div>
Hi<br />
<br />
Not 100% what you mean by 'filter web traffic through a dns server'<br />
<br />
If it means filtering email, you could setup MX records in DNS to pass incoming mail to a hardware spamfilter host which e.g. can use Barracuda appliances.<br />
After filtering this service will forward you the filtered email.<br />
<br />
If this is not what you mean please reply with more clear explaination.
</div>


Hi

Not 100% what you mean by 'filter web traffic through a dns server'

If it means filtering email, you could setup MX records in DNS to pass incoming mail to a hardware spamfilter host which e.g. can use Barracuda appliances.
After filtering this service will forward you the filtered email.

If this is not what you mean please reply with more clear explaination.

<div>
Basically how does opendns able to use dns to block or filter web traffic
</div>


Basically how does opendns able to use dns to block or filter web traffic

<div>
<div class="content wysiwyg-content">
How is it possible to filter web traffic through a dns server. &nbsp; How does opendns do it? &nbsp;Are they using a product like barracuda? How does filtering get setup?
</div>
</div>


How is it possible to filter web traffic through a dns server.   How does opendns do it?  Are they using a product like barracuda? How does filtering get setup?

How to setup a dns server that filters web traffic

The Domain Name System (DNS) is a hierarchical, globally distributed system responsible for associating the name of a computer, service or other resource into an IP address for connecting to the Internet or a private network. Most prominently, it translates domain names to the numerical IP addresses needed for the purpose of computer services and devices worldwide.

Security is the protection of information systems from theft or damage to the hardware, the software, and the information on them, as well as from disruption or misdirection of the services they provide. The main goal of security is protecting assets, and an asset is anything of value and worthy of protection.  Information Security is a discipline of protecting information assets from threats through safeguards to achieve the objectives of confidentiality, integrity, and availability or CIA for short. On the other hand, disclosure, alteration, and disruption (DAD) compromise the security objectives.

Security

Web development includes all aspects of presenting content on intranets and the Internet, including delivery development, protocols, languages and standards, server software, browser clients, databases and multimedia generation.