According to some security experts, Conficker, will tomorrow, April 1, try to get in touch with one of the thousands of sites that supposedly will give it further instructions to continue his path of evil.

One of the best ways to prevent Conficker coming into contact with these sites, is to prevent the DNS server from resolving  the sites in question, which may seem a complicated task, but it is not.

OpenDNS, which is free, provides DNS servers that do not resolve the addresses requested by Conficker. All that is needed is to replace in your computer or network the DNS servers used for resolution of  Internet addresses. Warning! Do not change the DNS servers that resolve names internally!

In addition to preventing the Conficker “phone home” the OpenDNS allows you to see if you have any infected computer on your network through a state panel that it provides. In it, we can see how many sites were blocked and why.

Lista de domínios bloqueados
Lista de Domínios Bloqueados

But OpenDNS is much more that blocing Conficker. Its databases contain millions of sites divided into different categories that we can choose to banish from our network (or computer).This capability, coupled with its speed, availability and other small features OpenDNS makes an essential service and free … 🙂

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