I read some about this function and tried to understan som of the commands in php but didn't very well. So if for example using: disable_functions = exec, shell_exec, system, passthru Can this mess up the most common scripts like oscommerce with processor or any other scripts ? If using shell_exec above will this stop php shell scripts ? Any tips, good or bad regarding disable_functions and how it affects clients using different commands is appreciated. And another question: what is port 53 used for ?