DNS based web filtering employs cloud technology to send an Internet content filtering service equally as effective as hardware or software solutions, but without the capital spending and high maintenance overheads of either. As with most cloud-based technologies, DNS based web filtering software is convenient and reliable, and –vital for many businesses these days – scalable.

Additionally, in order to be fully effective against online threats, any Internet filtering solution has to have SSL inspection in order to review the content of encrypted web pages. Whereas SSL inspection can drain CPU resources and memory when incorporated in hardware and software solutions, with DNS based web filtering the inspection process is done in the cloud – thus enhancing network performance.

In order to filter Internet content through a Domain Name Server (DNS), you need to sign up for a web filtering service. The service provider gives you a browser-based account you sign into, add your external IP address and set your web filtering policy. Then you simply send your DNS system settings to the service provider´s web filtering service.

If you have multiple web filtering policies for different roles within your group, tools are in place to integrate management tools such as LDAP and Active Directory with the web filtering service. It is also possible to implement a DNS proxy for per user reporting and select from a number of predefined reports. Alternatively, it is a simple process to customize your own reports.

Because of the way in which DNS based web filtering works, it is compatible with every type of network and operating system. Multiple locations and domains can be managed from one management portal, and – due to the SSL inspection process being conducted in the cloud – end users will not experience the latency usually associated with hardware and software solutions.

The two most recorded reasons given for putting in place an Internet content filter are to safeguard the company from web-borne threats and to enforce acceptable use policies. DNS based web filtering achieves both these targets by using a three-tier mechanism for filtering Internet content. The three tiers work together to maximize the company’s security and stop users accessing material that could hinder productivity or cause offense.

The first tier includes SURBL and URIBL filters. These are commonly referred to as blacklists and they compare each request to visit a website against IP addresses from which malware downloads, phishing attacks and spam emails are known to have spawned from. When matches are found, the request to visit the website is denied.  Blacklists are supplied and updated by your service provider.

Behind the blacklists, category filters and keyword filters provide the second and third lines of security. These can be applied by system administrators to stop users visiting websites within certain categories (social networking for instance), or those likely to contain material that would be inappropriate for an office setting. Keyword filters can also be used to prevent users obtaining specific content or web applications, or downloading files with extensions most associated with malware.

Exemptions to general policies can be applied to user or user group if access to a website or web application is required by a department within the company. For instance, you may not want your employees to engage in personal Internet banking during working hours, but it is likely vital your finance department has access to online banking services. Similar exemptions could be made (say) if your marketing department needed view to the company´s Facebook or Twitter accounts.

SpamTitan offers businesses a choice of DNS based web filtering solutions – WebTitan Cloud for companies with fixed networks, and WebTitan Cloud for WiFi for companies supplying a wireless service to end users. Both DNS based web filtering solutions have been created with maximum ease of use, maximum granularity and maximum defense against web-borne threats.

Along with being versatile and effective DNS based web filtering solutions, both WebTitan Cloud and WebTitan Cloud for WiFi are packed full of features to safeguard your company. Both solutions have best-in-class malicious URL detection, phishing protection and antivirus software – all of which is updated automatically. We also update our filtering mechanisms in real time – including the categorization of new websites as they are released.

Our service grows in line with your company, so you never have to be concerned about adding new users or even multiple networks. WebTitan Cloud and WebTitan Cloud for WiFi are infinitely scalable, with no bandwidth restrictions, and no latency issues. Unless you advise them, your users will never know they are being protected from web-borne threats until they try to visit an unsafe or inappropriate web page.


  • No capital outlay or high maintenance overheads.
  • Convenient, trustworthy and infinitely scalable.
  • SSL inspection carried out in the cloud.
  • Enhanced network performance.
  • Supports unrestricted web filtering policies.
  • Compatible with every operating system.
  • Centralized, Internet-based management.
  • Can be used on fixed and wireless networks.
  • No bandwidth restrictions or latency problems.

If you would like to get a feel for the benefits of DNS based web filtering for free, do not hesitate to get in touch with us. We are offering firms the chance to try WebTitan Cloud or WebTitan Cloud for WiFi for free, with no set up costs or credit cards required, no contracts to complete, and no commitment to continue using our service at the end of the thirty-day trial time duration.

To discover more about this opportunity, talk with one of our Sales Technicians today. They will answer any questions you have about DNS based web filtering and guide you through the process of establishing your free account. If you later require any help redirecting your DNS or navigating the management portal, we are always here to assist you.