I am running Nginx/ISPConfig setup for about 6-7 months. Never had a problem and everything is smooth. But I just noticed that if browse to "blab.example.com", the page opens one of my wordpress blogs on the other domain.
No matter what name I use for subdomain, Anything that I enter randomly "b53ks.example.com" still goes to that blog page.
I have 3 or 4 different domain names and websites on the same server. But I think I misconfigured somewhere and that might be the cause of this.
Lets say I have these domains: example-1.com, example-2.com, another-example.com
If I go to
google.another-example.com the returned page is my blog at
Note : I didn't set any subdomain in ISPConfig. Instead, I used "Add new website" for making a subdomain.