OB2D與DHCP及電腦教室動態分配固定真實IP

1. 安裝dhcp3伺服器
   apt-get install dhcp3-server
   vi /etc/dhcp3/dhcpd.conf
   
   

   #
   # Sample configuration file for ISC dhcpd for Debian
   #
   # $Id: dhcpd.conf,v 1.4.2.2 2002/07/10 03:50:33 peloy Exp $
   # 本例子以大橋國小為例，自動分配虛擬IP，但亦可自動分配固定的真實IP
   #全域設定
   #option definitions common to all supported networks...
   option domain-name "dc2es.tnc.edu.tw";
   option domain-name-servers 163.26.174.1,163.26.200.11, 168.95.1.1, 139.174.55.244;
   option subnet-mask 255.255.0.0;
   default-lease-time 86400;
   max-lease-time 86400;
   
   #要分配出去的網段
   shared-network network_tag {
   
   #第1個網段域192.168.0.0/255.255.0.0 虛擬IP
   
   subnet 192.168.0.0 netmask 255.255.0.0 {
   
   #DHCP要分配出去的IP範圍
   range 192.168.120.1 192.168.120.254;
   range 192.168.121.1 192.168.121.254;
   range 192.168.122.1 192.168.122.254;
   option domain-name-servers 163.26.174.1, 163.26.200.11, 168.95.1.1, 139.175.55.244;
   option domain-name "dc2es.tnc.edu.tw";
   option broadcast-address 192.168.255.255;
   option subnet-mask 255.255.0.0;
   option routers 192.168.0.1;
   
   #動態分配固定IP的寫法
   
   # host n5500 {
   # hardware ethernet 00:14:FD:13:10:58;
   # fixed-address 192.168.1.100;
   # }
   }
   
   #第2個網段 163.26.174.0/255.255.255.0 真實IP
   subnet 163.26.174.0 netmask 255.255.255.0 {
   
   #range加上#號表示不會自動分配非固定ip出去，但仍可以分配固定的真實ip
   #range 163.26.174.51 163.26.174.239;
   
   option domain-name-servers 163.26.174.1, 163.26.200.11, 168.95.1.1, 139.175.55.244;
   option domain-name "dc2es.tnc.edu.tw";
   option broadcast-address 163.26.174.255;
   option subnet-mask 255.255.255.0;
   option routers 163.26.174.254;
   
   #動態分配固定IP的寫法
   
   # host seednet070 {
   # hardware ethernet 00:1e:d8:12:16:d4;
   # fixed-address 163.26.174.247;
   # }
   
   #INCLUDE 電腦教室動態分配固定IP的設定檔進來
   #若需要時請自行解除#
   #include "/etc/dhcp3/3f";
   #include "/etc/dhcp3/2f";
   }
   }

   
   
    　
2. 產生DHCP 自動分配固定IP的設定檔
   
   底下的指令請先安裝大量建帳號shell script(見前一篇文章)
   
   

   cd /user/dhcp
   ./mac /var/lib/dhcp3/dhcpd.leases mac.csv

   
   將目前所有的dhcp分配到的ip,mac和電腦名稱存成mac.csv
   
   
   若mac指令無法執行則請以g++重新編輯一次mac.cpp,會得到a.out,再把a.out改名為mac
   g++ mac.cpp
   
   
   設法以EXCEL編輯mac.csv
   刪除掉不要的記錄後，使用EXCEL再存回mac.csv檔
   
   
   執行
   

   ./g fixdhcp mac.csv > 3f

   
   就可以產生DHCP分配固定IP所需的設定檔語法(上例為本校3F電腦教室)
   

   mv 3f /etc/dhcp3
   cd /etc/dhcp3
   vi dhcpd.conf

   
   要先建立一個subnet，並在其內加上include 指令
   subnet 163.26.174.0 netmask 255.255.255.0 {
   #range 指令mark起來表示這段subnet不會分配任何動態ip出去
   #range 163.26.174.51 163.26.174.239;
   
   
   option domain-name-servers 163.26.174.1, 163.26.200.11, 168.95.1.1, 139.175.55.244;
   option domain-name "dc2es.tnc.edu.tw";
   option broadcast-address 163.26.174.255;
   option subnet-mask 255.255.255.0;
   option routers 163.26.174.254;
   include "/etc/dhcp3/3f";
   
   }
   
   
   最後重新啟動dhcp3
   
   service dhcp3-server restart