Try any of these:

Googlebot/2.X (http://www.googlebot.com/bot.html)
   The Google Web crawler.
Mozilla/3.0 (Win95; I)
   Netscape Navigator 3.0 on Windows 95.
Mozilla/3.01 (Macintosh; PPC)
   Netscape Navigator 3.01 on a Macintosh.
Mozilla/4.0 (compatible; MSIE 4.01; AOL 4.0; Windows 98)
   The AOL browser, based on Microsoft Internet Explorer 4.01, on Windows
98.
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
   Microsoft Internet Explorer 6.0 on Windows 2000.
Mozilla/5.0 (compatible; Konqueror/2.2.2; Linux 2.4.14-xfs; X11; i686)
   Konqueror 2.2.2 for Linux.
Mozilla/5.0 (Windows; U; Win98; en-US; rv:0.9.2)

Gecko/20010726 Netscape6/6.1
   Netscape 6.1 on Windows 98.
Opera/6.x (Windows NT 4.0; U) [de]
   The German version of Opera 6.x on Windows NT.
Opera/7.x (Windows NT 5.1; U) [en]
   The English version of Opera 7.x on Windows XP.

> trying to fetch the following url:
> http://www.leader.ru/secure/who.html
>
> with
> ...
> $referer="http://www.leader.ru/";
> $user_agent="Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.1)";
> $url="http://www.leader.ru/secure/who.html";
> $cookies="c:/cookies/cookies.txt";
>
> $header[] = "*.*";
> $ch = curl_init();
> curl_setopt($ch, CURLOPT_REFERER,$referer);
> curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
>
> curl_setopt($ch, CURLOPT_URL,$url);
> curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
> curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
> curl_setopt($ch, CURLOPT_COOKIEJAR, $cookies);
> curl_setopt($ch, CURLOPT_COOKIEFILE, $cookies);
> $result = curl_exec ($ch);
> curl_close ($ch);
> unset($ch);
>
> ...
> it says thats the browser is unsupported and cant display the page.
> whats the trick? user agent is clearly set.
> thanks for any help.

--
Brian Wilkins
brian_at_hcc.net
Software Engineer
Heritage Communications Corporation
  Melbourne, FL     USA     32935