我们今天来做DHCP服务器的配置，我们的前提示要实现用一台虚拟机做DHCP服务器
1.首先，我们要有DHCP软件，我们用到下面两个软件（可以使用其他方法从网上直接安装，具体方法网络搜索）
dhcp-3.0pl1-23.i386.rpm
dhcp-devel-3.0pl1-23.i386.rpm
下载后，安装
# rpm -ivh /home/yanji/dhcp*.rpm
2.我们更新一下搜索的数据内容，查找我们的主配置文件
# updatedb
# locate dhcpd.conf
/etc/log.d/conf/services/dhcpd.conf
/usr/share/doc/dhcp-3.0pl1/dhcpd.conf.sample
/usr/share/man/man5/dhcpd.conf.5.gz
我们不难发现有一个文件是dhcpd.conf.sample，这个文件是我们最重要的切入点。
接下来使用下面的命令在目的目录下新建/etc/dhcpd.conf文件，是DHCP的配置文件
# cp /usr/share/doc/dhcp-3.0pl1/dhcpd.conf.sample /etc/dhcpd.conf
3.下面我们就修改这个DHCP配置文件
说明：
| 名称 | 解释 |
| subnet | 指定子网作用域 |
| option routers | 网关 |
| option subnet-mask | 网关子网掩码 |
|
option domain-name option domain-name-servers |
DNS，设置的域名和域名服务器的IP |
| option time-offset |
时区时间 |
| range dynamic-BOOTP | 设置DHCP的地址池 |
| default-lease-time |
默认租约时间 |
| max-lease-time | 最大租约时间 |
| host | 设置保留主机名，即相当于静态分配一个 |
下面是文字版的配置信息
1 ddns-update-style interim;
2 ignore client-updates;
3
4 subnet 10.10.10.0 netmask 255.255.255.0 {
5
6 # --- default gateway
7 option routers 10.10.10.10;
8 option subnet-mask 255.255.255.0;
9
10 option domain-name "ns.gr.org";
11 option domain-name-servers 10.10.10.10;
12
13 option time-offset 28800;
14 # option ntp-servers 192.168.1.1;
15 # option netbios-name-servers 192.168.1.1;
16 # --- Selects point-to-point node (default is hybrid). Don't change this unless
17 # -- you understand Netbios very well
18 # option netbios-node-type 2;
19
20 range dynamic-bootp 10.10.10.100 10.10.10.200;
21 default-lease-time 21600;
22 max-lease-time 43200;
23
24 # we want the nameserver to appear at a fixed address
25 host boss {
26 next-server marvin.redhat.com;
27 hardware ethernet 12:34:56:78:AB:CD;
28 fixed-address 207.175.42.188;
29 }
30 }
4.配置完上面的内容后，我们重启一下DHCP服务
# service dhcpd start
9789 pts/0 S 0:00 grep dhcpd
我们把虚拟机的DHCP获取去掉
再把Windows下面的网络适配器的VMNet1设置为自动获取
设置好之后，我们的最关键的都做了，看结果的时候到了，我们运行cmd，输入 ipconfig，下面显示的就证明我们配置成功了（我们配置的地址池最后一个是200），可以用我们的虚拟机做DHCP服务器了
6.查看Linux下的租约文件
# cat /var/lib/dhcp/dhcpd.leases
1 # All times in this file are in UTC (GMT), not your local timezone. This is 2 # not a bug, so please don't ask about it. There is no portable way to 3 # store leases in the local timezone, so please don't request this as a 4 # feature. If this is inconvenient or confusing to you, we sincerely 5 # apologize. Seriously, though - don't ask. 6 # The format of this file is documented in the dhcpd.leases(5) manual page. 7 # This lease file was written by isc-dhcp-V3.0pl1 8 9 lease 10.10.10.200 { 10 starts 1 2015/04/06 18:25:34; 11 ends 2 2015/04/07 00:25:34; 12 binding state active; 13 next binding state free; 14 hardware ethernet 00:50:56:c0:00:01; 15 uid " 01 00PV300 00 01"; 16 client-hostname "PC-20140925ISEN"; 17 }
租约文件存在，我们有空的时候可以看看这个租约文件是什么内容。