Post Views: 3,008 Configuring a firewall rule in Ubuntu typically involves using iptables or nftables. I have written a separate article on iptables here. What if we wanted to make life a little less involved. The answer is ufw (Uncomplicated Firewall), which is a user-friendly front-end for managing iptables firewall rules. Here’s how you can […]
A Simple Linux Firewall – ufw Read More »
Post Views: 3,605 iptables is a command-line utility in Linux that allows you to configure the rules of the packet filtering and NAT (Network Address Translation) framework, known as netfilter, within the Linux kernel. It is a key tool for managing network traffic and implementing a firewall on Linux systems. Here’s an overview of what
How to Configure iptables in Linux Read More »
Post Views: 1,710 Service provider technicians need routine Wi-Fi skills training and they need to know how to troubleshoot Wi-Fi networks for several important reasons: Troubleshooting Wi-Fi networks is essential for service provider technicians to ensure reliable service, maintain customer satisfaction, and keep up with the fast-paced advancements in networking technology. Because the Wi-Fi network
Why ISP Technicians Need Routine Wi-Fi Skills Training Read More »
Post Views: 2,275 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.
What was the nature of the July 2024 CrowdStrike computer outages? Read More »
Post Views: 4,133 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.
Why are NAT/NPAT not a security function? Read More »
Post Views: 3,927 Are you new to Wireshark? 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
A Simple Capture and Filter Exercise for Wireshark Read More »
Post Views: 8,468 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
What ever happened to ATM (Asynchronous Transfer Mode)? Read More »
Post Views: 205,194 So many folks use Windows and they want to capture Wi-Fi traffic in Monitor Mode (aka RFMON) 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. You
A List of USB Wi-Fi Adapters that support Monitor Mode Read More »
Post Views: 9,917 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
What is the ‘whois’ command? Read More »
Post Views: 6,880 Let’s say you wanted to view our site back in 2001. Could you do it? The answer is yes! That’s right, someone has been crawling the web called the Wayback Machine (https://web.archive.org). The Wayback Machine is a digital archive of the World Wide Web and other information on the Internet created by
View Historical Web Pages with Wayback! Read More »
Post Views: 3,356 In our prior article on companion tools for Wireshark (link), we provided a list of tools that network analysts, operations, maintainers or just curious people should consider. All these were stand alone tools. What about Internet/Web Browser based sites that you may find useful? This thought raises certain issues, like this scenario:
Web Sites that can be Companion Tools to Wireshark Read More »
Post Views: 3,946 Wireshark is a powerful network protocol analyzer used by network professionals for troubleshooting, analysis, development, and education. Companion tools can enhance its functionality or help in related tasks. If you are looking for hard tools we have a list of what we carry in our “go bag” here. Here are some websites
Stand Alone Companion Tools to Wireshark Read More »
What is the NIST SP 800-183 Networks of ‘Things’ Guideline About?
What is the NIST Special Publication 800-183 About? Read More »
What is the ISO/IEC 27008 Information technology — Security techniques — Guidelines for the assessment of information security controls Guideline About?
What is the ISO/IEC 27008 Guideline About? Read More »
What is The NIST 800-171 Protecting Controlled Unclassified Information in Nonfederal Systems and Organizations About?
What is the NIST Special Publication 800-171 About? Read More »
