Acad,
слышно Wget или IE. Firefox др..
сделай wget --users-agent="Firefox версия" <сайт>
L~$
L~$ echo "" | nc -l 12345 &
[2] 13471
L~$
L~$
L~$ wget -q 127.0.0.1:12345 -O-
GET / HTTP/1.1
User-Agent: Wget/1.15 (linux-gnu)
Accept: */*
Host: 127.0.0.1:12345
Connection: Keep-Alive
[2]- Готово echo "" | nc -l 12345
L~$
видите User-Agent: Wget/1.15 (linux-gnu)
а фирефокс клиенту
L~$
L~$ echo "" | nc -l 12345
GET / HTTP/1.1
Host: 127.0.0.1:12345
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:43.0) Gecko/20100101 Firefox/43.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.7,en;q=0.5,en-GB;q=0.3,en-CA;q=0.2
Accept-Encoding: gzip, deflate
Cookie: md5=9aea81df1211f1b363301e1de63687d0
Connection: keep-alive
L~$
вот
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:43.0) Gecko/20100101 Firefox/43.0