The screen froze for three seconds as Wireshark tried to render the chaos. Then, it filled.
Aris had set up the capture filter: host 10.0.0.25 . That was "Client-3," the dummy machine the newbies would use. He expected a quiet sea of ARP requests and the occasional SYN-ACK handshake. wireshark lab
He initiated an ARP scan. The lab's switch, a manageable Cisco catalyst, was supposed to isolate ports. But the Wireshark capture showed something impossible: Client-3 was responding to ARP requests for every IP on the subnet. It had claimed the entire network. The screen froze for three seconds as Wireshark
Because the lab wasn't just a room anymore. It was a conversation. And someone—or something—had just asked the first question. That was "Client-3," the dummy machine the newbies would use
A text conversation materialized in the "Follow UDP Stream" window. It wasn't machine code. It was English. > Is anyone there? > I can see you. He minimized the window. This was a closed lab. No internet access. No Wi-Fi. Just three VMs on a hypervisor. He checked the source IP again: 10.0.0.25. Client-3. The dummy machine.
The capture stopped. The torrent of red and black vanished. The packet list went empty. The switch logs showed Client-3 shutting down gracefully, as if nothing had happened.
It wasn't supposed to be like this. The "Wireshark Lab" was a routine exercise for the new junior analysts. A controlled environment. A safe little network with three virtual machines, a switch, and a firewall. The goal was simple: capture a standard HTTP login, an FTP file transfer, and a DNS query. Basic pattern recognition.