I followed the document and manual for build up two Debian Mirror server with ISPConfig. Under my test with mirror, I found slave server does not pickup the backup role. What I test ? Bring down the master server and try to login to access slave server ISPConfig admin console. It does not found the page. I read the manual again, it is because "Install ISPConfig Web-Interface (y,n) [y]: <--n" does not install on slave server. How can I active the slave server when master server go down ?? I want to ask that how many poeple install mirror server successful ?? Can anyone share the step or succesful story.