DHCP服務

====複習 架DHCP SERVER===

1.為LINUX新增IP位址(同一張網卡)

若eth0
    192.168.1.5
    255.255.255.0

gateway 192.168.1.1

新增IP位址: 192.169.1.6 到同一張網卡

#cd /etc/sysconfig/network-scripts

#cp ifcfgeth0 ifcfg-eth0:0

#vi ifcfgeth0\:0

-------------------------------------------------------------------------------------------

準備-VM(Linux CentOS)

    etho    Birdged

    eth1    hostonly-vmnet1

    eth2    hostonly-vmnet2

2.安裝DHCP伺服器

#yum -y install dhcp

3.設定

複製範本檔到執行目錄etc
#cp /usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample    /etc/dhcpd.conf

修改 設定檔內容
#vi /etc/dhcpd.conf

4. 啟動dhcpd 服務

A 機器:
#service dhcpd restart

5. 啟動NAT
#echo "1" > /proc/sys/net/ipv4/ip_forward


=== 安裝POSTFIX 郵件伺服器 === 

6. 安裝DNS服務

套件 bind , bind-utills , bindchroot
#yum -y install bind
#yum -y install bind-utils
#yum -y install bindchroot

#  將設定範例檔拷貝到 /etc/named.conf


#/usr/sbin/dns-keygen
LAAkQqcdNUXBVIk5CPG8PrIs7Ij9c0YP21bXAxh6D5KNJqsXu3VDjWvYVrcp   <==請複製KEY
…

還沒設完 請參考其它DNS設定

7.安裝 postfix

#yum -y install postfix

#vim /etc/postfix/main.cf

    mydomain=a236.snpy.org
    inet_interface=all
    myhostname=a236.snpy.org

:wq

# service postfix restart