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Raja, Umar and Les are working on a paper on TULIP and its application to Visual Tracerouting to be submitted later this year
We have sent a reminder email to Yahoo giving them an update on TULIP and how it might be extended to meet their needs. They have responded, they appear to be interested. We are trying to interest them in providing landmarks. No update 2/18/2013, 3/26/2014.
PingER at SLAC
PingER at SLAC
Les requested an update from Yahoo about TULIP's gelocation. They answered "We are very much interested in getting IP triangulation at internet scale, we will have internal sync-up on how we can leverage this initiative if there is rate limit and get back. Regarding opening up yahoo sites for deploying ping server requires some more time to discuss this with relevant stake holders with in yahoo."The PingER monitoring hosts at Taiwan, FNAL, UERJ(.br), sprace(.br), and South Africa(.za) have been restored to a working state.
Les sent email to Google as follows: "I would like to bring to your attention that we have developed a geolocation tool using delay based (using RTTs from known ping server landmarks) distance estimates to triangulate the location of an IP host target. The tools is accessible at: http://www-wanmon.slac.stanford.edu/cgi-wrap/reflex.cgi. We have identified that the accuracy of the geolocation is directly related to the landmark density (e.g. # of landmarks/ million sq km). The higher the density the smaller the error. We currently have over 1000 registered landmarks, of which at any given time ~300 are working. The tool not onlyfinds the location of the target, it also gives an estimated error. To the best of our knowledge it is the only freely available delay based measurement geolocation tool publicly available today. A drawback (compared to database methods such as those based on GeoMind) is the time taken to make the measurements. We have worked in this from manydirections including parallelization of the ping requests, caching, tiering to get the rough location (i.e. region of the world) then zooming in using all landmarks in the region. We are putting together a publication on this."
The PingER monitoring hosts at Taiwan, FNAL, UERJ(.br), sprace(.br), and South Africa(.za) have been restored to a working state. Les contacted the Hong Kong, Rutherford Lab (.uk), Daresbury Lab (.uk), CEFET (.br, UNESP(.br) and ACMESecurity (.br) PingER monitors to try and get them fixed. The Hong Kong contact has retired.
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