I always disable most of the services witch are activated by a default Centos 5.3 instalation.
To disable them, run the following commands:
chkconfig anacron off
chkconfig apmd off
chkconfig atd off
chkconfig autofs off
chkconfig cpuspeed off
chkconfig cups off
chkconfig cups-config-daemon off
chkconfig gpm off
chkconfig isdn off
chkconfig netfs off
chkconfig nfslock off
chkconfig openibd off
chkconfig pcmcia off
chkconfig portmap off
chkconfig rawdevices off
chkconfig readahead_early off
chkconfig rpcgssd off
chkconfig rpcidmapd off
chkconfig smartd off
chkconfig xfs off
chkconfig ip6tables off
chkconfig avahi-daemon off
chkconfig firstboot off
chkconfig yum-updatesd off
chkconfig mcstrans off
chkconfig pcscd off
chkconfig bluetooth off
chkconfig hidd off
And you might consider disable this:
chkconfig sendmail off<br />chkconfig xinetd off<br />chkconfig acpid off<br />chkconfig microcode_ctl off<br />chkconfig irqbalance off<br />chkconfig haldaemon off<br />chkconfig messagebus off<br />chkconfig mdmonitor off<br /><br /><b>REFERENCE</b><br /><a href="http://manueljoaosilva.com/2009/06/centos-5-3-minimal-services/">http://manueljoaosilva.com/2009/06/centos-5-3-minimal-services/</a><br />
