Hi Jochen,
no thank you, we have no DNS problem, I would know about it :-) No repository is configured:
# zypper repos
No repositories defined. Use the 'zypper addrepo' command to add one or more repositories.
There is just one service, to which we have no password:
# zypper ref -s
Refreshing service 'nu_novell_com'.
Authentication required for 'https://nu.novell.com/?credentials=NCCcredentials'
User Name: bc599208a29b4b92b33fe580ccb54edf
-- Micha