Since yesterday I have not been able to update my sources using
anoncvs to netbsd.org. Has something changed, or is something broken?

lingo# echo $CVS_RSH 
ssh
lingo# cat CVS/Root 
anoncvs@anoncvs.netbsd.org:/cvsroot
lingo# cvs -q upd -dP
Secure connection to anoncvs.netbsd.org refused.
cvs [update aborted]: end of file from server (consult above messages if any)

/Janne