Packets or it didn't happen!
  • When MacOS Catalina Comes to Life: The First Few Minutes of Network Traffic From MacOS 10.15. - Dr. J
    This is continuing a post from April about network traffic from Windows 10. When dealing with network traffic, it is always good to know what is normal. As part of this series, I will investigate the first few minutes of network traffic from current operating systems. With macOS 10.15 Catalina just being released, I figured […]
  • The Weekly Zeek: DNS Cache Poisoning detection - Andy
    Recently in class, we were discussing detection strategies for DNS cache poisoning attacks. One of the ideas was to look for duplicate DNS replies to the same request. This would be pretty difficult with signature detection tools and flow data wouldn’t have enough details. Zeek would be perfect for this type of detection. Let’s write […]
  • The Weekly Zeek: Events, not packets - Andy
    One of the Zeek concepts we discuss in SEC503: Intrusion Detection In-Depth is how scripts are reacting to events, not necessarily packets. Yes, Zeek processes packets and scripts can be written to react to individual packet characteristics but this is through exposed events. A single packet may trigger one event but, more than likely, it […]
  • The Weekly Zeek: Death of &persistent - David Hoelzer
    Unfortunately, the &persistent attribute for variables in Zeek has been deprecated. Even though several people in the Zeek community set out good arguments for the retention of this attribute, the Zeek development team has remained completely silent and has chosen to remove the attribute from Zeek. What’s the Problem? Certainly, we should all be thankful […]
  • DNS over HTTPS - David Hoelzer
    [Updated] I’m clearly not the only one who thinks that DNS over HTTPS is a big deal. The United States Congress has sent a letter to Google about this (under the pretense of anti-competition issues raised by ISPs who would be unable to see and subsequently sell DNS information about their customers) and the Mozilla […]

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