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Laura Chappell
It's TCP/IP's Birthday!
In 1974, the world was focused on the Rumble in the Jungle and Richard Nixon's resignation in disgrace. In that same year (in May), Vint...
Laura Chappell
TCP Sequence Number in ACK Scans
During a recent class, I received a question related to ACK scans. "What Sequence Number would you see on the response to an ACK scan?"...
Laura Chappell
Detect Suspicious Traffic with "TCP Conversation Completeness"
In my last blog entry, I explained how Wireshark calculates TCP Conversation Completeness based on the TCP flags and whether data is seen...
Laura Chappell
Using Wireshark's TCP Conversation Completeness
Wireshark added the TCP conversation completeness measurement to identify elements contained in captured TCP conversations. In this post,...
Laura Chappell
Virtual Event Hosting and Video Streaming Troubleshooting
Updated: September 27th, 2020 In March, thousands of IT professionals and students joined us for CORE-IT, a free...
Laura Chappell
The "Legit" DDoS on PG&E
See the legitimate DDoS on PG&Es site after they announced that power would be shut off to upwards of 800,000 customers in October 2019.
Laura Chappell
Packet Challenge: Look it Up in the Dictionary [100119]
Packet Challenge: Look it up in the Dictionary - download the trace file and test your skills on this Packet Challenge.
Laura Chappell
Troubleshooting SYNs of the Network
After a painfully slow LinkedIn launch, I grabbed the traffic and saw some definite issues in the TCP handshake processes.
Laura Chappell
Customize the Wireshark Expert
Wireshark is a piece of clay. In this blog, Laura teaches you how to customize the Expert Information - an often overlooked feature.
Laura Chappell
Spurious Retransmissions - a Concern?
Should you be concerned about Spurious Retransmissions in a trace file? What triggers these indications and what should you do?
Laura Chappell
Free TCP Analysis Poster
The Chappell University team will be joining our Partner in Technology Education, Profitap, at Stand 3233 at RSA 2019 in San Francisco!...
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