CẤU HÌNH CƠ BẢN TRÊN CENTOS 6.0

1. Tắt Firewall:
[root@dns ~]# /etc/rc.d/init.d/iptables stop
[root@dns ~]# chkconfig iptables off
[root@dns ~]# chkconfig ip6tables off

2. Tắt SELinux:
[root@dns ~]# vi /etc/sysconfig/selinux

# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - SELinux is fully disabled.

SELINUX=disabled

# SELINUXTYPE= type of policy in use. Possible values are:
#targeted - Only targeted network daemons are protected.
#strict - Full SELinux protection.

SELINUXTYPE=targeted

3. Cấu hình IP tĩnh cho máy Server:
[root@dns ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
HWADDR=00:50:43:00:3B:AE
ONBOOT=yes
# add lines as follows
BOOTPROTO=none
# this server's IP address
IPADDR=192.168.100.100
# subnet mask
NETMASK=255.255.255.0
TYPE=Ethernet
# default gateway
GATEWAY=192.168.100.1
# DNS server's IP address
DNS1=192.168.100.101
IPV6INIT=no
USERCTL=no

[root@dns ~]# /etc/rc.d/init.d/network restart

[root@dns ~]# chkconfig network on

[root@dns ~]# ifconfig

4. Thay đổi tên máy:
[root@dns ~]# hostname
[root@dns ~]# uname -n
[root@dns ~]# dnsdomainname

[root@dns ~]# vi /etc/sysconfig/network

NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=dns.ispace.com

[root@dns ~]# reboot

Chúng ta có thể bắt tự cập nhật mà không cần phải khởi động lại
[root@dns ~]# source /etc/sysconfig/network
[root@dns ~]# hostname $HOSTNAME