Hello, We have found a problem, pretty serious to us, on a new Debian 9 ISPConfig 3.1.11 (current last version) new install using Perfect Server guide: https://www.howtoforge.com/tutorial...-9-stretch-apache-bind-dovecot-ispconfig-3-1/ After searching for several options we have finally discovered that the problem seems to be on Debian itself, here is the scenario: When server is configured dynamic IP (DHCP) everything works fine and we can log in successfully on new ISPConfig instance. But when changing to static public IP we cannot log in anymore. After digging a bit we found the problem is in log in script: /usr/local/ispconfig/interface/web/login/index.php Problem code line is: if(count($_POST) > 0) When using static IP the $_POST variable is Always empty. So the post data is never recognized. We have tried several things before debugging code, as checking all network settings more than twice, changing Mysql passwords and even reinstalling the whole ISPConfig instance, nothing solved the problem. We have also tried to find if PHP has a known issue but found nothing and only researched that a possible variable named enable_post_data_reading could cause such issue, but it is turned on already. So I want to ask about some other thing we can check out from you the experts. Thanks a lot in advance.
