1. Menyembunyikan Versi Apache dan Identitas OS dari Error

yum install vsftpd
service vsftpd start
chkconfig vsftpd on
vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE="eth0"
NM_CONTROLLED="yes"
ONBOOT=yes
HWADDR=22:1A:09:16:BD:3A
TYPE=Ethernet
BOOTPROTO=none
IPADDR=192.168.3.102
PREFIX=24
GATEWAY=192.168.3.11
DNS1=192.168.3.11
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0"
UUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03