You can try using the methods available from LWP::UserAgent and HTTP:Request: (from perldoc lwpcook) 
use LWP::UserAgent;

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

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

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

[download]

Jeff 

R-R-R--R-R-R--R-R-R--R-R-R--R-R-R--
L-L--L-L--L-L--L-L--L-L--L-L--L-L--

In reply to (jeffa) Re: LPW and proxies by jeffa
in thread LWP and proxies by John M. Dlugosz

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