What does OSSEC do if you have a file that you change and the put back again with a couple of seconds?
root@mpatalberta:~/joeblow# md5sum hellopat.txt
4ede564a1a999242405ce4d5c13335ec hellopat.txt <- original file
root@mpatalberta:~/joeblow# md5sum hellopat.txt
4ede564a1a999242405ce4d5c13335ec hellopat.txt
root@mpatalberta:~/joeblow# vi hellopat.txt
root@mpatalberta:~/joeblow# md5sum hellopat.txt
fc7fd69e2682cbe416382997304b093d hellopat.txt. <- change file
root@mpatalberta:~/joeblow# vi hellopat.txt
root@mpatalberta:~/joeblow# md5sum hellopat.txt
4ede564a1a999242405ce4d5c13335ec hellopat.txt. <- put the file back to original
root@mpatalberta:~/joeblow# md5sum hellopat.txt
4ede564a1a999242405ce4d5c13335ec hellopat.txt
Pat,