IT Trenches:

network analysis


March 29, 2010  2:14 PM

Wireshark Book – Coffee & a Quickie



Posted by: Troy Tate
ethereal, Laura Chappell, network, network analysis, packet analysis, packet capture, protocol analysis, technology reference, wireshark

Laura Chappell,

December 18, 2009  8:33 PM

Broadcast traffic told me the network was contaminated



Posted by: Troy Tate
broadcast, network analysis, packet capture, protocol analysis, troubleshooting

If you don't know what's broadcasting on your network, you don't know your network! I recently discovered a rogue network cross-connection on a network. The cross connect was from an unmanaged internet connection to a private LAN. The way I discovered this was using Wireshark and listening for all...


November 19, 2009  3:21 PM

Online Nmap video training – scan your network



Posted by: Troy Tate
blackhat, education, free training, hacker, host identification, network analysis, network testing, nmap, online training, penetration testing, scanning, training, training resources, vulnerability scanning, whitehat

Nmap has been around a long time. It has become an indispensable tool for identifying systems, services and vulnerabilities on a network. It has also been featured in movies like The Matrix...


October 15, 2009  6:44 PM

Free Training – Laura Chappell presents: Wireshark 201 Jumpstart – Filtering on the Good, the Bad, the Ugly



Posted by: Troy Tate
analysis, education, ethereal, howto, IT education, Laura Chappell, Metrics, Monitoring, network analysis, Networking, packet analysis, packet capture, performance monitoring, protocol analysis, reporting, tcp/ip, tools, trace files, training, troubleshooting, wireshark

Laura Chappel, the BitGirl, is at it again with another in her series of Wireshark Jumpstart webinars. The next one is called


October 7, 2009  6:38 PM

IT services and The Three Chinese Curses



Posted by: Troy Tate
bot, botnet, career, information security, information technology, infosec, IT, network analysis, professional, Security, service level, support, trojan

In America, October is the time when haunting, evil spirits and curses come to mind. Earlier today I posted a blog entry titled Can IT education bring an end to the...

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September 30, 2009  1:06 PM

Where do TCP resets come from?



Posted by: Troy Tate
application performance, network analysis, network management, network monitoring, network performance, packet capture, performance analysis, protocol analysis, tcp, udp

I recently came across an excellent article on the topic of TCP resets. TCP is a connection-oriented protocol as opposed to the connectionless nature of UDP. So, if there are TCP resets on your network, this is not a bad thing and is just inherent in the protocol. Without TCP resets, a host could...


July 24, 2009  6:03 PM

Using Wireshark to analyze a bot infected host



Posted by: Troy Tate
bot, data capture, education, ethereal, information security, Laura Chappell, network analysis, network security, packet analysis, packet capture, Security, tutorial, wireshark

My favorite Bitgirl (Laura Chappell) is at it again in this 15 minute presentation. She came across a host on a network that appears to be infected with some bot application. Take a few...


July 20, 2009  6:36 PM

Wireshark quickstart tutorial – learn to capture network traffic



Posted by: Troy Tate
analysis, education, ethereal, howto, IT education, Laura Chappell, Metrics, Monitoring, network analysis, Networking, packet analysis, packet capture, performance monitoring, protocol analysis, reporting, tcp/ip, tools, trace files, training, troubleshooting, wireshark

There are more upcoming sessions in the Laura Chappell seminar series called Wireshark 101Jumpstart tutorials. Check out the schedule at Chappell University website. Some of the things you will learn include:


May 26, 2009  7:34 PM

Repetition is one of the keys of learning



Posted by: Troy Tate
analysis, education, ethereal, howto, IT education, Laura Chappell, Metrics, Monitoring, network analysis, Networking, packet analysis, packet capture, performance monitoring, protocol analysis, reporting, tcp/ip, tools, trace files, training, troubleshooting, wireshark

I recently posted an update about Laura Chappell's Chappell University Online seminars. I attended one of these seminars today. What...


May 21, 2009  12:57 PM

Master key tasks for network troubleshooting – Chappell University Online Seminars



Posted by: Troy Tate
analysis, education, ethereal, howto, IT education, Metrics, Monitoring, network analysis, Networking, packet analysis, packet capture, performance monitoring, protocol analysis, reporting, tcp/ip, tools, trace files, training, troubleshooting, wireshark

I'm a huge fan of Laura Chappell. She has a great sense of humor and is a great educator about all things packet oriented. Previous posts about Laura have included:

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