Browser fingerprinting

Reading time: 2 – 2 minutes

Com a simple curiositat m’he dedicat a capturar el q els nostres navegadors
envien quan ens connectem a una pàgina web. D’aquesta forma ens podem
adonar com l’implementació d’un estàndard varia molt segons el
programador.

Per tal de fer aquesta prova únicament m’he dedicat a simular un
servidor HTTP (nc -l p 8000) al port 8000 i fer-hi connectar diferents
navegadors, els resultats són aquests:

Lynx 2.8.3:

GET / HTTP/1.0
Host: localhost:8000
Accept: text/html, text/plain, text/sgml, */*
Accept-Encoding: gzip, compress
Accept-Language: en
User-Agent: Lynx/2.8.3rel.1 libwww-FM/2.14

Netscape 6.1:

GET / HTTP/1.1
Host: 192.168.1.1:8000
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.2)
Gecko/20010726 Netscape6/6.1
Accept: text/xml, application/xml, application/xhtml+xml, text/html;q=0.9,
image/png, image/jpeg, image/gif;q=0.2, text/plain;q=0.8, text/css,
*/*;q=0.1
Accept-Language: en-us
Accept-Encoding: gzip,deflate,compress,identity
Accept-Charset: ISO-8859-1, utf-8;q=0.66, *;q=0.66
Keep-Alive: 300
Connection: keep-alive

Mozilla 0.9.3:

GET / HTTP/1.1
Host: 192.168.1.1:8000
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.3)
Gecko/20010801
Accept: text/xml, application/xml, application/xhtml+xml, text/html;q=0.9,
image/png, image/jpeg, image/gif;q=0.2, text/plain;q=0.8, text/css,
*/*;q=0.1
Accept-Language: en-us
Accept-Encoding: gzip, deflate, compress;q=0.9
Accept-Charset: ISO-8859-1, utf-8;q=0.66, *;q=0.66
Keep-Alive: 300
Connection: keep-alive

Internet Explorer 5.5:

GET / HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/vnd.ms-powerpoint, application/vnd.ms-excel, application/msword,
*/*
Accept-Language: es
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0)
Host: 192.168.1.1:8000
Connection: Keep-Alive
Cookie: cookie_test=1