Now let's start shutting down excess services we don't need. Run

chkconfig --list | grep on

This will show you most of the default services ie

[root@plain root]# chkconfig --list | grep on
keytable        0:off   1:on    2:on    3:on    4:on    5:on    6:off
syslog          0:off   1:off   2:on    3:on    4:on    5:on    6:off
gpm             0:off   1:off   2:on    3:on    4:on    5:on    6:off
sendmail        0:off   1:off   2:on    3:on    4:on    5:on    6:off
kudzu           0:off   1:off   2:off   3:on    4:on    5:on    6:off
omawsd          0:off   1:off   2:off   3:on    4:on    5:on    6:off
netfs           0:off   1:off   2:off   3:on    4:on    5:on    6:off
network         0:off   1:off   2:on    3:on    4:on    5:on    6:off
random          0:off   1:off   2:on    3:on    4:on    5:on    6:off
rawdevices      0:off   1:off   2:off   3:on    4:on    5:on    6:off
ipchains        0:off   1:off   2:on    3:on    4:on    5:on    6:off
iptables        0:off   1:off   2:on    3:on    4:on    5:on    6:off
crond           0:off   1:off   2:on    3:on    4:on    5:on    6:off
anacron         0:off   1:off   2:on    3:on    4:on    5:on    6:off
xfs             0:off   1:off   2:on    3:on    4:on    5:on    6:off
xinetd          0:off   1:off   2:off   3:on    4:on    5:on    6:off
autofs          0:off   1:off   2:off   3:on    4:on    5:on    6:off
sshd            0:off   1:off   2:on    3:on    4:on    5:on    6:off
httpd           0:off   1:off   2:off   3:on    4:on    5:on    6:off
raidmon         0:off   1:off   2:on    3:off   4:off   5:off   6:off
        telnet: on
[root@plain root]#

Use chkconfig --help to see the options. We want to disable all unnecessary services. For example (using above config)

[root@plain root]# chkconfig --help
chkconfig version 1.3.5 - Copyright (C) 1997-2000 Red Hat, Inc.
This may be freely redistributed under the terms of the GNU Public License.

usage:   chkconfig --list [name]
         chkconfig --add <name>
         chkconfig --del <name>
         chkconfig [--level <levels>] <name> <on|off|reset>)
[root@plain root]# chkconfig --level 2345 ipchains off
[root@plain root]# chkconfig --level 345 xinetd off
[root@plain root]# chkconfig telnet off
[root@plain root]# chkconfig omawsd off