How do I scrape external content using a URLScraper channel through a proxy that requires authen

I need to scrape external content but my Portal Server lies in my Intranet. The company has a Proxy server that needs authentication in order to browse the Internet.

In the gateway settings, I have made the entries:

iplanet.com|

* Proxyip:proxyport|

This works in the sense that the gateway contacts the proxy for the content, but I get the Proxy Authentication failed page.

Where do I pass my username and password?

Regards,

Vibha

[487 byte] By [708858] at [2007-11-25 4:39:08]