I've been running a news fetcher at work sucessfully for some time, until WEBSweeper was installed. The problem now is that the standard method of authenticating (as shown in the LWP cookbook doesn't work. For example: 
my $ua = LWP::UserAgent->new;

# Proxy location
$ua->proxy(['http', 'ftp'] => 'proxy-url');

# What we want - hardcoded
my $req = HTTP::Request->new('GET',"target-url");

# Authenticate against the proxy - hardcoded
$req->proxy_authorization_basic("domain/user", "password");

[download]

Sadly I now get a 407 and, before you ask, the domain, username and password are upto date :). In fact this worked without a hitch on MSProxy v2.0. Now I've done some searching and NTLM authentication appears (at a glance) to be what I need to do but frankly I have NO IDEA what that is or how to do it.

Even more frustrating is that the following Java code never broke: 
URL url = new URL("target");
String authString = "domain/user:password";      
String auth = "Basic " + new sun.misc.BASE64Encoder().encode(authStrin
+g.getBytes());
URLConnection conn = url.openConnection();
            conn.setRequestProperty("Proxy-Authorization", auth);

[download]
But I can't think of how to emulate that in Perl, or even if I should. I've also tried the other authentication methods that I could find (as well as mucking about with the headers) but that was just a case of shotgun debugging that I shouldn't really admit to :)

Can anyone help?

In reply to WEBSweeper Proxy Authentication by simon.proctor

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