Sorry,
But this is what happened, i think:
I use 2 nic's in my pc, and had tried in the past a program called "nic express " to combine both nic's toone IP-adres.
As i could'nt get it to work properly i removed it again.
Since then the troubles started...., i remember now.
Last week I did another try to get it work, but then my pc started to reboot automatically, so i removed it again, with result that all of my internet kept working, exept HFS, which i could not get working again at all.
Somehow it stayed unreachable from the internet, probably caused by some register changes from Nic Express
Therefore i made a new install, and blamed " nic express " in combination with my lack of knowledge of that program.