• Securing Open DNS Resolvers Against Denial of Service Attacks

    Scott Hogg  |  May 19, 2014
    The Domain Name System (DNS) has been the target of many types of attacks in recent years. Authoritative DNS servers are exposed to the Internet and generally allow queries from all IP addresses. However, DNS resolvers are typically internal... Read more
  • Improved Network Security through DNS Inspection (Pt. 2)

    Scott Hogg  |  February 19, 2014
    In the previous blog post on DNS traffic inspection we covered how attackers target DNS systems. Attackers use Fast-Flux DNS techniques to rapidly change the server's hosting malware. Attackers control malware to change the DNS behavior on... Read more