bqj123 wrote: > hello all: > I want to install ModSecurity v2.5.4 in my system. I do the following > setup to install the lua On a RPM based distribution like CentOS, if you try to build stuff like that from source, you'll need to sort out all the package dependencies yourself, AND have files on your system which aren't under the control of the packaging system. It appears there is a yum repository for modsecurity here http://www.jasonlitka.com/yum-repository/ If they aren't up-to-date, you could perhaps use their SRPM spec files and build your own RPM files from the latest project sources, but this might take some tweaking.