Thanks a lot. I resolved it differently, but not entirely to my satisfaction, because the htdig I use now has a security hole in it. However, I use a password, so not really a problem.
I went to ftp.redhat.nl and downloaded htdig and webhtdig there for redhat 7.1 and that worked. You have to replcase the files in /var/www/ to your files in an ibay for instance. And configure the etc/htdig.conf in two places. Then it works.
hc