A Simple Wireshark Trick for Troubleshooting DHCP

When troubleshooting DHCP problems, one of the biggest challenges is separating the packets you care about from the thousands you don’t. On a busy network, a packet capture with Wireshark can quickly fill with traffic from dozens or even hundreds of devices. Somewhere in that capture are the DHCP packets from the device you are investigating, but finding them without filtering can feel like searching for a needle in a haystack. One of the most effective ways to simplify the process is by using the DHCP “Client MAC Address” field as a display filter, which allows you to isolate the exact DHCP conversation tied to a specific device.

from thenetworkdna; Part 2 Network Security Fundamentals

 In Part-2 Network Security Fundamentals, The Network DNA expands the conversation beyond technical tools to highlight the human and physical elements of a strong security program. The article underscores that even the best defensive technologies can fall short without well-trained users and strict physical protections for critical infrastructure. By prioritizing user awareness, security training, and physical access control, organizations can reduce common risks like phishing, accidental data exposure, and unauthorized entry into secure areas.

Don’t Let Blips Wreck Your bits

 

If you’ve ever had your computer suddenly shut off during a storm or brief power flicker, you already know how frustrating—and potentially damaging—it can be. That’s where a UPS (Uninterruptible Power Supply) comes in. Think of it as a safety net for your electronics. Instead of your system instantly losing power, a UPS provides temporary battery backup, giving your equipment enough time to stay running or safely shut down. For anyone who relies on computers, servers, or networking gear, that small buffer can make a huge difference.

Mozilla's free built in vpn

Mozilla is rolling out a free built-in VPN directly into Firefox with the upcoming Firefox 149 update, set to start releasing on March 24, 2026.

Here's the key details from recent announcements:

• It's browser-only (routes just your Firefox traffic through a proxy to hide your IP address and approximate location—no full-device protection like their paid Mozilla VPN).
• Completely free, no subscription or extra downloads needed, and Mozilla emphasizes it's built on their privacy principles (unlike some sketchy free VPNs out there).
• At launch, you'll get 50GB of data per month.
• Initially available only in the US, UK, France, and Germany (likely expanding later).
• This is part of a bigger Firefox 149 update that also includes things like split-screen browsing (Split View), tab notes, better AI feature controls, a visual refresh, and a new mascot named Kit.

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Windows Finally Learns the Magic Word: “Sudo”

 

For years, Windows users who needed administrative privileges in the terminal had to jump through a few awkward hoops—usually launching an entirely new “Run as administrator” window or wrestling with the clunky runas command. The article explains how Microsoft has finally embraced a much simpler approach by introducing the familiar sudo command to Windows 11. Borrowed from the Linux world, sudo allows users to run a single command with elevated privileges without turning the entire terminal session into an administrative free-for-all.