I have put thousands of websites with ISPconfig fine for few months. I have found all the sites are down yesterday but it seems only impact the httpd port. Only apache is down, I can ssh into server fine. All the websites are added by Remoted ISPconfig, so I just deleted the latest one subdomain site that I think it seems not added properly. Then restart the httpd... I can not view all the websites on browser as 403 error now. Even /etc/init.d/ispconfig_server start is no problem. I have tried to compare Vhosts_ispconfig.conf with another normal ISPconfg server. They seems not quite the same. But if I tried to modifiy the Vhosts_ispconfig.conf manually, Ispconfig will change it back itself. How to resolve the 403 problem? Anybody help? Thanks.