cpan via proxy

[email protected] (Andreas Moroder) Fri, 22 Jun 2007 10:55:56 +0200
Newsgroups perl.cpan.discuss
Message-ID <[email protected]>
Hello,

all our ftp traffic passes through a squid proxy.
How can I configure cpan to download the files using the proxy ?
The port used ist 3128 and it is necessary to authenticate.

Thanks
Andreas