Hi,
We have closed the ftp service on root.cern.ch. Please update your links. The conversion scheme is:
OLD: ftp://root.cern.ch/root/pythia6.tar.gz
NEW: root.cern.ch/download/pythia6.tar.gz
i.e. …/download/
Please let us know whether this causes problems on your side and we’ll re-open the ftp service.
In case you care about the reasons, there are plenty of good summaries out there. See e.g. policypatrol.com/five-reason … tp-server/ or write your own set of reasons 
Cheers, Axel.