PROXIES 
    Some sites use proxies to go through fire wall machines, or just as cache in order to improve performance. Proxies can also be used for accessing resources through protocols not supported directly (or supported badly :-) by the libwww-perl library.

    You should initialize your proxy setting before you start sending requests: 

      use LWP::UserAgent;
      $ua = LWP::UserAgent->new;
      $ua->env_proxy; # initialize from environment variables 
      # or
      $ua->proxy(ftp  => 'http://proxy.myorg.com');
      $ua->proxy(wais => 'http://proxy.myorg.com');
      $ua->no_proxy(qw(no se fi));

      my $req = HTTP::Request->new(GET => 'wais://xxx.com/');
      print $ua->request($req)->as_string;

    The LWP::Simple interface will call env_proxy() for you automatically.
    Applications that use the $ua->env_proxy() method will normally not use the $ua->proxy() and $ua->no_proxy() methods.

    Some proxies also require that you send it a username/password in order to let requests through. You should be able to add the required header, with something like this:

     use LWP::UserAgent;

     $ua = LWP::UserAgent->new;
     $ua->proxy(['http', 'ftp'] => 'http://username:password@proxy.myorg.com');

     $req = HTTP::Request->new('GET',"http://www.perl.com");

     $res = $ua->request($req);
     print $res->decoded_content if $res->is_success;