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What was the nature of the July 2024 CrowdStrike computer outages?
Post Views: 165 I am getting asked a lot about this. Below is mix of reporting and my take on what happened and what needs to be done. Just so we are clear: I have no secret inside knowledge or insight into the problems. But if you are looking for a clear explanation, read on.
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Why are NAT/NPAT not a security function?
Post Views: 232 Network Address Translation (NAT) and Network Port Address Translation (NPAT) are not considered a security function because its primary purpose is to modify the L3 network address information in IPv4 packet headers and L4 port numbers of TCP or UDP while in transit. NAT and NPAT are not needed in IPv6 networking.
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A Simple Capture and Filter Exercise for Wireshark
Post Views: 250 Someone asked the following “getting started” question on the Wireshark Discord site, and it prompted me to write this FAQ to help newcomers to Wireshark understand how to navigate the initial complexity of packet capture. Hi everyone! I’m new here and just downloaded wireshark for a Computer Comm class. I need to
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What ever happened to ATM (Asynchronous Transfer Mode)?
Post Views: 361 Asynchronous Transfer Mode (ATM) was once seen as a promising Layer 2 networking technology due to its ability to handle a variety of traffic types (voice, video, and data) with high efficiency and quality of service (QoS) performance guarantees. I spent several years working with and then teaching ATM courses to my
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A List of USB Wi-Fi Adapters that support Monitor Mode
Post Views: 14,177 So many folks use Windows and they want to capture Wi-Fi traffic in Monitor Mode using their onboard Wi-Fi adapter, and, for those of us who have tried, we all know how problematic that is. The answer as discussed in my post here is to use an external adapter. So which adapter
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What is the ‘whois’ command?
Post Views: 907 The whois command is a tool commonly used on various operating systems, including Linux, MacOS, and Windows, to query databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system. It can provide information such as the domain
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