Post Views: 2,229 Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture As those who have studied our Wireless Profile (available from the Profile Repository) know, there are a number of great display filters used to hunt down issues
tshark Use in Wireless Networking Read More »
Post Views: 4,960 Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture Perhaps…. Of course you can edit these with appropriate addresses and numbers. The ones used are just examples. Unlike Wireshark’s Display Filter syntax, Capture filters use Berkley
Perhaps a top 15 Wireshark Capture Filter List Read More »
Post Views: 1,623 If you would like a definition of what Net Neutrality is and where it stands in the US – look here. If you are a networking geek and want to experiment with Net Neutrality using Wireshark – look here.
Want to understand Net Neutrality? Like burgers? This will explain… Read More »
Post Views: 2,624 Check out these additional Routing Resources: Our IP Routing course at Udemy Our Routing Collection on Patreon Our Custom Profiles for Wireshark Classes at the Online School This is commonly asked question from our routing courses and routing discussions in other courses. Let’s explain this command in this article. To start, you
What is the ‘area range’ command in OSPF? Read More »
Post Views: 2,473 Check out these additional Routing Resources: Our IP Routing course at Udemy Our Routing collection at Patreon Our Custom Profiles for Wireshark Classes at the Online School In a recent course on IPv6, one of my students asked what the “network” command did as we were beginning to study the routing commands
What is the “network” Command in OSPF and BGP? Read More »
Post Views: 3,536 If you attend our WLAN Operations course, one of the things we discuss is Active Scanning. Your system uses your saved Wi-Fi networks to actively scan for those networks (probing). There are potential security risks in this, especially with free networks. Most students conclude they should not remember networks in this way.
Deleting Remembered Wi-Fi Networks in Windows, MacOS, and Linux (Debian) Read More »
Post Views: 1,862 Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture Let me begin with a little background. At CellStream, and the Online School of Network Sciences, we have taught hundreds of Wireshark classes for general networking, voice
Complaint: Why Don’t You Allow Employees to use Wireshark? Read More »
Post Views: 1,646 Sometimes troubleshooting in Wireshark is easy-ish, you find a misbehaving protocol behavior or pattern or even a bad packet, sometimes it is tricky and takes a while to find something, and sometimes it is as clear as mud. Check out these great references as well: Our custom profiles repository for Wireshark Our
Real-life Wireless Wireshark Troubleshooting Example Read More »
Post Views: 1,710 The following is a must have reference for Linux systems networking operations. We will be using the two basic commands: ‘ifconfig’, ‘iwconfig’, and ‘ip’. If you are the rtoot or administrator you should have no issues using the commands as shown. If you do not, you may want to use ‘sudo’ in
Linux Networking Commands Read More »
Post Views: 2,211 I was recently (this was 2017) asked the question “If I want to get into Networking, what should I learn?” If you want to see the 2025 answer – click here. A great question because Telecommunications or Data Networking is really not a degree program at most universities, at least not at
If I want to get into Networking, what should I learn? Read More »
Post Views: 2,830 How can you verify your Wi-Fi is on the right channel, who else is interfering? We wish that was easy. And at a normal user level it is. First you need a Wi-Fi scanner. The following is a growing list of Wi-Fi Scanning Utilities for various platforms. Most all are free,
Wi-Fi Scanning Tools List Read More »
Post Views: 2,503 In a recent set of email exchanges with a client, we were tackling the challenges of hiring engineers and technical staff. I can summarize the most interesting issues as follows: Deliberately, we have not listed the normal hiring checklist items. The answer to the first question can be summarized in a single
Technology Hiring – Always a Tough Challenge Read More »
Post Views: 23,715 You have to think of and understand the Internet’s Domain Name Service -DNS- as a System. The DNS is the system which, in its primary function, converts Internet domain names that you type into URL bars, or hyperlinks that you click on a web page into numeric IPv4 and/or IPv6 addresses. In
The DNS System In Depth Read More »
Post Views: 8,453 Hi everyone! Being able to decrypt the encrypted contents of packet captures is very important if you want to troubleshoot anything above Layer 4. This is even more important today as the network is evolving to QUIC where everything is encrypted. Check out these great references as well: Our custom profiles repository
TLS Decryption in Wireshark Using Key Log Files in Windows, MAC, and Linux Read More »
Post Views: 2,468 Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on Wireshark Our Udemy course on Wireless Packet capture I am often asked how SSL and TLS can be decrypted in Wireshark captures. I have written a separate article on HTTPS Decryption in Wireshark here. NOTE:
Leveraging SSL and TLS Decryption in Wireshark Read More »
