I've installed virtualmin on a fresh centos 6 on my dedicated server, also try this on a fresh centos 6 x86 vps. In both cases I've seen that webmin uses:
in bind8 config file while bind-chroot is not installed.This cause problems.I've to manually change it to :
to fix everything.
I've another question, is it possible to setup rndc key from cli instead of webmin gui ? I'm not familiar with the complete steps :