First of all I'd like to thank you a lot for your advise. Unfortunately I couldn't get our firewall to let me pass through to ftp.debian.org using the parameters in dselect's ftp access.
Fortunately control lies in perl scripts. I had to modify those that call FTP.pm, but then it worked like a charm. I use the original parameters to log on to our gateway. So I needed to add a 'quote site some.debian.mirror' and a logon for it. Thanks a lot to get me going, -- Martin Fehlhaber [EMAIL PROTECTED]