Hey, I just noticed I had a bunch of error message where the sec. zone file would not be written on bind restart ... so secondary (slave) zones were not answering and not writing any sec.zone file... I found that ispconfig does "create" the slave directory to put thoses files but does not give bind enough rights to write into it ... I had to chmod 777 /var/cache/bind/slave so that bind could write into it... the chown is correctly set to root:bind. Just in case some other people are stuck with this... (and that might allow dev to have a look on this so that it's fixed next version)
