Originally Posted by falko
Change the IP in /root/ispconfig/httpd/conf/httpd.conf and in /home/admispconfig/ispconfig/lib/config.inc.php (if it is in there).
Then change the IP in ISPConfig itself (Management -> Server -> Settings). You also have to change it for every web site in ISPConfig.
and what about when hostname should be changed, is it enough to change it in the ISPconfig panel, or should it be changed in every config file like /etc/postfix/main.cf e.t.c.