Desigur, ai aici useragents: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6 Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:5.0) Gecko/20100101 Firefox/5.0 Mozilla/5.0 (Windows NT 6.1.1; rv:5.0) Gecko/20100101 Firefox/5.0 Mozilla/5.0 (X11; U; Linux i586; de; rv:5.0) Gecko/20100101 Firefox/5.0 Mozilla/5.0 (X11; Linux i686) AppleWebKit/535.1 (KHTML, like Gecko) Ubuntu/11.04 Chromium/14.0.825.0 Chrome/14.0.825.0 Safari/535.1 Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.824.0 Safari/535.1 Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:5.0) Gecko/20100101 Firefox/5.0 Mozilla/5.0 (Macintosh; PPC MacOS X; rv:5.0) Gecko/20110615 Firefox/5.0 Mozilla/5.0 (Windows; U; MSIE 9.0; WIndows NT 9.0; en-US)) Mozilla/5.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; Media Center PC 4.0; SLCC1; .NET CLR 3.0.04320) Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 6.0; en-US) Mozilla/5.0 (compatible; Konqueror/4.5; FreeBSD) KHTML/4.5.4 (like Gecko) Opera/9.80 (Windows NT 6.1; U; es-ES) Presto/2.9.181 Version/12.00 Opera/9.80 (X11; Linux x86_64; U; fr) Presto/2.9.168 Version/11.50 Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_8; de-at) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1 Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; da-dk) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1 Ce este un User Agent? O mini aplicatie a clientului/softului folosit ce permite identificarea versiunii de soft folosita, a sistemului de operare folosit, a versiunii sistemului de operare si asa mai departe. Atunci cand folosim un browser si accesam un site, User Agent-ul browserului este interogat si astfel serverul, in functie de parametri setati ne poate permite sau respinge accesul la serviciul dorit.