Have seen a similar issue in the list, but still prefer to post my issue too. As per the documentation provided with mod_security-2.6.2 , after building the source (I'm using vc 9 and windows XP) it should create mlogc.exe in "modsecurity-apache_2.6.2\apache2\mlogc-src" but this folder is always empty. How can I create mlogc.exe, is there any other way to build the same? Please help ..