1 / 6

Nick Feamster

Nick Feamster. Research Interest: Networked Systems Arriving January 2006 Likely teaching CS 7260 in Spring 2005 Here off-and-on until then. Email works well. CS 7001 Mini-projects posted: http://www.cc.gatech.edu/~feamster/mini-projects/.

Download Presentation

Nick Feamster

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Nick Feamster • Research Interest: Networked Systems • Arriving January 2006 • Likely teaching CS 7260 in Spring 2005 • Here off-and-on until then. Email works well. • CS 7001 Mini-projects posted: • http://www.cc.gatech.edu/~feamster/mini-projects/ feamster@cc.gatech.eduhttp://www.cc.gatech.edu/~feamster/

  2. The Internet Internet Routing • Large-scale: Thousands of autonomous networks • Self-interest: Independent economic and performance objectives Abilene Georgia Tech Comcast AT&T Level3

  3. Problems • Network Security • How to guarantee where traffic will or won’t go? • How to counter Web censorship and surveillance? • What techniques are spammers using? • Network Reliability and Troubleshooting • How can operators tell when they’ve made mistakes? • How to protect the network from others? • Connectivity at the network edge

  4. Today: Reactive Operation What happens if I tweak this policy…? • Problems cause downtime • Problems often not immediately apparent Revert No Yes Desired Effect? Wait for Next Problem Configure Observe

  5. Catastrophic Configuration Faults “…a glitch at a small ISP… triggered a major outage in Internet access across the country. The problem started when MAI Network Services...passed bad router information from one of its customers onto Sprint.” -- news.com, April 25, 1997 “Microsoft's websites were offline for up to 23 hours...because of a [router] misconfiguration…it took nearly a day to determine what was wrong and undo the changes.” -- wired.com, January 25, 2001 “WorldCom Inc…suffered a widespread outage on its Internet backbone that affected roughly 20 percent of its U.S. customer base. The network problems…affected millions of computer users worldwide. A spokeswoman attributed the outage to "a route table issue." -- cnn.com, October 3, 2002 "A number of Covad customers went out from 5pm today due to, supposedly, a DDOS (distributed denial of service attack) on a key Level3 data center, which later was described as a route leak (misconfiguration).” -- dslreports.com, February 23, 2004

  6. “Drive-By” ISP • More coverage: • Buy service - Charge passersby • Challenges: • Privacy- Accounting How to get credit for opening my access point while preserving the privacy of those who use it?

More Related