Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.
From very early in my networking career I have been fascinated by protocol details, packet captures and the features of my top 3 application troubleshooting tool: Wireshark.
Getting the captures on the endpoints (clients/servers) is relatively easy but things can get difficult when you want to capture traffic somewhere in between and is hard to do port mirroring (SPAN) on some remote switch.
Packet Capture Capabilities of Cisco Routers and Switches is an old video (4 years is old right?) posted on the Cisco Support Forums that highlights different methods to get on box packet captures in Wireshark .pcap format or in text output.
KRACK is the short name for an attack to the WPA (Wi-Fi Protected Access) security protocol, both WPA1 and WPA2. The vulnerability allows Wi-Fi traffic to be decrypted withouth knowledge of any keys even when using “secure” encryption like WPA2 (personal or enterprise).Continue reading