I'd like to know if i can run 2 master servers behind the same router. My problem is that i have my mali and websites on the 1st master server and they are running fine but i need to have 1 page on the 2nd server so if it crashes on lunch it does not crash everything. The servers are installed following the https://www.howtoforge.com/perfect-...2-php-mysql-pureftpd-bind-dovecot-ispconfig-3 My problem is that when the request for the domain comes it looks only on the 1st server and when it does not find it it shows the 1st website on the 1st server and it does not go looking on the 2nd master server. How can i make it to look on both servers? Do i have to add the 2nd servers private IP in the hosts file of the 1st master server like you have on the master-slave server config?