I have a website foo.com and now I have setup a sub-domain sub.foo.com. I can open foo.com and its fine but when I try to open or ping sub.foo.com its not happening. I cant even FTP into sub.foo.com. I am using virtualmin to manage all these. What am I missing here ? Do I have to create a CNAME or any kind or domain specific configurations to get the sub domain going ??
All I need to do is to create a sub-domain and put my own contents.