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Do You Really Know Who is Using Your Systems?

U NIFORMED S ERVICES U NIVERSITY of the Health Sciences. James A. Zimble Learning Resource Center. Do You Really Know Who is Using Your Systems?. Stephan Spitzer Lead Developer/DBA, Applied Medical Informatics James A. Zimble Learning Resource Center. Problem Overview.

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Do You Really Know Who is Using Your Systems?

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  1. UNIFORMED SERVICES UNIVERSITY of the Health Sciences James A. Zimble Learning Resource Center Do You Really Know Who is Using Your Systems? Stephan Spitzer Lead Developer/DBA, Applied Medical Informatics James A. Zimble Learning Resource Center MAC-MLA 2008

  2. Problem Overview “On the Internet, Nobody Knows You’re a Dog” A cartoon by Paul Steiner, which appeared in The New Yorker, July 5th, 1993 MAC-MLA 2008

  3. Who We Are? • Uniformed Services University of the Health Sciences (USUHS) • Medical education and research facility for the nation’s military and public health community • Located in Bethesda, Maryland MAC-MLA 2008

  4. Electronic Resources (ER) • Portal to over 9,000 electronic resources • Services over 7,500 global users: • Current students and staff • Alumni • Affiliate institutions MAC-MLA 2008

  5. ER - Main Display MAC-MLA 2008

  6. Why Worry About Access? • Most of our resource offerings are limited by license agreements • We need to have accurate usage statistics so that we supply resources for our legitimate users • Affiliate institutions pay us per user • We have a large, mobile, diverse, and dispersed user population MAC-MLA 2008

  7. First Step - Record Access Information ACTION: • Each user signon date and time is saved with patron record RESULT: • Inactive users can be purged from the active user database ACTION: • Each user access of an electronic resource is logged, including browser’s IP address RESULT: • Have basis for more detailed checking MAC-MLA 2008

  8. Google Analytics - Next Step • Free service gathers various usage information about web sites • Simple to configure MAC-MLA 2008

  9. Google Analytics - Dashboard MAC-MLA 2008

  10. Google Anayltics - Network Detail MAC-MLA 2008

  11. What’s Missing? • We have user’s access information • We have locations that accessed our resources • Need to match: LOCATION <> USER MAC-MLA 2008

  12. Matching IP to Location - What Doesn’t Work (Well) • Internet’s Domain Name System (DNS) • Distributed database of name servers • Resolve names to locations • http://network-tools.com/ information via browser • Nslookup,whois client, etc.are real-time(ie, too slow) • Need something static and fast MAC-MLA 2008

  13. GeoLite City - The Missing Link • Open Source (free) database of geographic information • Maps IP to City/Country, world-wide • Self-contained database • Simple API available for most programming languages MAC-MLA 2008

  14. Putting It All Together • Wrote PHP script to query MySQL access logs and call GeoCity API to get user locations • Find each patron access within a timeframe and list where and when they accessed our resources MAC-MLA 2008

  15. Suspicious Activity • Odd Locations • Siberia?; Philippines? • “Excessive” Usage • Access 24x7; lots of access in short timeframes; consistent high access • Impossible Geographic/Timeframe Usage • Different cities/countries/continents in same day/hour MAC-MLA 2008

  16. Example - Odd Location • Found our Siberian user: MAC-MLA 2008

  17. Example - “Excessive” Usage • This is one user for one day: MAC-MLA 2008

  18. Example - Impossible Geography • Two Users - Two Stories: • Legitimate • Problematic MAC-MLA 2008

  19. Findings • Site/Organization utilizes proxies • Account info left in browser • Explicit sharing of account • Account compromised MAC-MLA 2008

  20. Access Results 2007 2008 -------- -------- Apr 30,526 38,666 --- take user access actions --- May 28,469 32,003 June 29,439 25,656 July 31,747 30,935 MAC-MLA 2008

  21. Follow-Up ”Doveryai, No Proveryai” (Trust, but Verify) • Re-run script periodically to check compliance MAC-MLA 2008

  22. Resources • Google Analytics • http://www.google.com/analytics/ • GeoLite City • http://www.maxmind.com/app/geolitecity • This Presentation • http://www.lrc.usuhs.mil/brown/MAC-MLA2008_Spitzer.pps • My Contact Information • Stephan.Spitzer.ctr@lrcm.usuhs.mil MAC-MLA 2008

  23. Questions? MAC-MLA 2008

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