Removal of insecure packages and unnecessary software from server.

Please check to see the packages that are not needed on a web server. You can use the command rpm -qa to list all the installed rpm packages on the server. From the list remove packages choose the packages that are not required.
Some common examples of unnecessary packages are given below.

mtools
yp-tools
redhat-config-nfs
redhat-config-samba
tftp-server
ypserv
redhat-config-printer-gui
samba
samba-swat
cups
gmp-devel
ElectricFence
doxygen
Xfree86-xfs
redhat-config-printer
cups-libs
samba-common
samba-client

These packages are specific to RHEL 3. It varies in different distributions.