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The purpose of this tutorial is to train system administrators how to solve complicated server networking issues using standard libpcap and networking tools. The course breaks troubleshooting into 4 categories based on protocol: ethernet, IP, TCP, and application. For each category, the instructor will describe the important components of the protocol, how to use tools to monitor for errors, how to correlate the output from the tools, and the corrective actions that need to be taken. All teaching examples are in the form of case studies based off of production experiences. Example tools include tcpdump, tethereal, Wireshark, netstat, arp, route and ifconfig. Example case studies include troubleshooting arp, IP routing, TCP states, DNS, DHCP, and SMB/NFS. This tutorial provides a detailed whitepaper in addition to the presentation slides.
Attendees will learn how to apply a troubleshooting methodology using the correct tools to locate problems a server has communicating on a network. The attendee will then be able to identify the faulty component and apply the appropriate fix.
Darren Hoch has been teaching and consulting on Linux in government, academic and corporate settings since 1999. He currently works for StrongMail Systems in Redwood City, CA as the Director of Professional Services. His primary role at StrongMail is to build products and service offerings based off the Linux platform. Prior to StrongMail, Darren worked for both Sun Microsystems and Accenture as a technical consultant and trainer. He wrote the course “Enterprise Intrusion Analysis” for Sun and a portion of the “Sun Certified Security Administrator Exam”. While contributing multiple whitepapers to the open source movement, he speaks frequently at UNIX groups and conferences. Darren lives in Tulsa, OK with his wife Aleta and their two boys Paul and Scott.