Google is using the prefetch feature (in Firefox/Mozilla browsers) to conduct "research on network latency discovery".
Some SERPs are 'web-bugged' with links to pages like this :-
http://network-latency-discovery.l.google.com/ http://mar.nld.l.google.com:81/hit?2070581323
Which are clearly not meant for human eyes, saying only :-
"Thank you for participating in our research on network latency discovery!"
The logs below show what was prefetched with a simple search for [test]. That happened to be on Google Canada, and I don't know how often and domain/country widespread it happens.
Interesting. Perhaps they're in league with the NSA? ;) ...
http://news.google.com/news?q=nsa+latency+patent
-------Log--------- Requested URL: http://www.google.ca/search?&q=test , but this lot silently prefetched too (note the X-Moz: prefetch header) :-
http://network-latency-discovery.l.google.com/
GET http://network-latency-discovery.l.google.com/ HTTP/1.1 Host: network-latency-discovery.l.google.com User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.7.8) Gecko/20050511 Firefox/1.0.4 Keep-Alive: 300 Proxy-Connection: keep-alive Referer: http://www.google.ca/search?q=test X-Moz: prefetch
HTTP/1.x 302 Found Content-Type: text/html Location: http://mar.nld.l.google.com:81/hit?2070581323 Server: NetworkLatencyDiscovery Content-Length: 175 Connection: close
http://mar.nld.l.google.com:81/hit?2070581323
GET http://mar.nld.l.google.com:81/hit?2070581323 HTTP/1.1 Host: mar.nld.l.google.com:81 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.7.8) Gecko/20050511 Firefox/1.0.4 Keep-Alive: 300 Proxy-Connection: keep-alive Referer: http://www.google.ca/search?q=test
HTTP/1.x 200 OK Pragma: no-cache Content-Length: 309 Content-Type: text/html Connection: close -------Log---------
Milly
http://www.iMilly.com/google-cookie.htm |
my list...
es.nld.l.google.com – 138.100.12.149 mar.nld.l.google.com – 128.8.126.69 was.nld.l.google.com – 12.17.136.137 cn1.nld.l.google.com – 219.243.201.65 cn2.nld.l.google.com – 219.243.200.33 cn3.nld.l.google.com – 219.243.200.25 cn4.nld.l.google.com – 219.243.200.93 cn5.nld.l.google.com – 219.243.201.77 cn6.nld.l.google.com – 219.243.200.61 cn7.nld.l.google.com – 219.243.200.21 cn8.nld.l.google.com – 219.243.200.45 cn9.nld.l.google.com – 219.243.200.89 cn10.nld.l.google.com – 219.243.200.81 network-latency-discovery.nld.l.google.com – 64.233.179.216
any other known ? |
i do not really understand the above, but wish to report that my Firefox just tried to send outgoing to 219.243.200.33:81
KPF4 notified me and i denied it.
i entered the address at www.nwtools.com and found China Education and Research Network Center Tsinghua University Beijing
googling for firefox "219.243.200.33" found only this page. |