I have one domain hosted on server domain.com, there are about 20 subdomains as addon domains there. For no good reason someone has changed (chgrp) on all files in domain.com directory to domain.com user now all websites are showing 403 forbidden access error. What should i do now to resume websites. I have tried changing php handler but no luck yet :/ php5 handler is suphp and Apache suEXEC is on....
That looks your file permission or ownership has problems.
try to have the following permissions.
To change all direcotry permissions to 755 under linux use the following command.
To change all file permissions to 644 under linux use the following command.
The file owner should be the user who is running web server, in standard centos server it is apache, on ubuntu its www-data or nobody.
To change the group ownner and group use the following command. cd into the web root directory first.
if you dont have access to ssh try do that on ftp client.