Category Archives: Security

Recursive DNS Queries may degrade performance

It is a known fact that supporting open DNS recursion on your name servers is not recommended. Recursive queries cause more load on the name server and as I show in this article, it significantly degrades performance. I will quantify … Continue reading

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The DNS Changer Virus

The DNS Changer virus is a malware that infects your computer and changes your DNS servers to so called rouge DNS servers operated by the creators of the virus. The effect is that if you try to visit a site, … Continue reading

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