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SUMMARY:Netalyzr:  Network Measurement as a Network Security Problem - Nic
 holas Weaver\, ICSI and UC Berkeley
DTSTART:20110406T130000Z
DTEND:20110406T140000Z
UID:TALK30377@talks.cam.ac.uk
CONTACT:Wei Ming Khoo
DESCRIPTION:Netalyzr\, at http://netalyzr.net\, is a widely used network m
 easurement and debugging tool\, with over 180\,000 executions to date.  Ne
 talyzr is a signed Java applet coupled to a custom suite of test servers i
 n order to detect and debug problems with DNS\, NATs\, hidden HTTP proxies
 \, and other issues.  Netalyzr has revealed many problems in the Internet 
 landscape\, ranging from broken NAT DNS resolvers\, hidden\ncaches and mal
 functioning proxies\, to deliberate ISP manipulations of DNS results\, inc
 luding some ISPs which use DNS to man-in-the-middle search properties like
  Yahoo\, Google\, and Bing.  Although Netalyzr is\na network measurement t
 ool\, writing it was a network security process\, designed to detect unusu
 al conditions by deliberately bending (or outright breaking) protocol spec
 ifications\, using unintended features of Java\, and a general dose of "sn
 eaky".\n\nThis talk discusses the design of Netalyzr\, interesting cases o
 bserved during development\, and highlights some of the interesting result
 s including HTTP caches\, hidden proxies\, chronic overbuffering\, and DNS
  misbehaviors.\n
LOCATION:Lecture Theatre 2\, Computer Laboratory\, William Gates Building
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