i recently just pointed one of my subdomain to ispconfig3 server. I have not setup any virtual site for this subdomain therefore it should be pointing to my default webpage which is http://18.104.22.168/ But strangely it is pointing to one of my virtual site with a totally different domain name. I have looked into /etc/apache2/site-enabled/default and even added the line serveralias sub.domain.com But it still doesn't work. But one of my other sub domain which I used for setting up ispconfig is working fine. Any idea how to tackle this problem?