Linux的DHCP服务的搭建

一时失言乱红尘 2022-03-25 13:58 248阅读 0赞

1、首先要在服务机配置好yum源  
2、用yum安装dhcp软件

yum install dhcp -y

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNTcwMzY5_size_16_color_FFFFFF_t_70]  
3、更改dhcp的配置文件

vim /etc/dhcp/dhcpd.conf
    cp /usr/share/doc/dhcp*/dhcpd.conf.example /etc/dhcp/dhcpd.conf
    vim /etc/dhcp/dhcpd.conf

*首先找出DHCP服务的配置文件路径*  
![在这里插入图片描述][20190121160007752.png]  
*找一个有示例的配置文件*  
![在这里插入图片描述][2019012116022832.png]  
*覆盖，然后修改它*  
![在这里插入图片描述][20190121160412138.png]  
**dhcp文件内容**

*dhcpd.conf文件的内容：*

# dhcpd.conf
    #
    # Sample configuration file for ISC dhcpd
    #
    
    # option definitions common to all supported networks...
    option domain-name "dhcp.com";		##域名
    option domain-name-servers 7.7.7.7;		##网络DNS
    
    default-lease-time 600;
    max-lease-time 7200;
    
    # Use this to enble / disable dynamic dns updates globally.
    #ddns-update-style none;
    
    # If this DHCP server is the official DHCP server for the local
    # network, the authoritative directive should be uncommented.
    #authoritative;
    
    # Use this to send dhcp log messages to a different log file (you also
    # have to hack syslog.conf to complete the redirection).
    log-facility local7;
    
    # No service will be given on this subnet, but declaring it helps the 
    # DHCP server to understand the network topology.
    
    # This is a very basic subnet declaration.
    
    subnet 172.25.254.0 netmask 255.255.255.0 { 		##IP前三位和掩码
      range 172.25.254.1 172.25.254.253;			##分配的IP从哪里到哪里
      option routers 172.25.254.120;				##默认的网关
    }

4、启动dhcpd服务，关掉防火墙

systemctl start dhcpd
    systemctl stop firewalld

5、测试

用一台可以ping通服务机的主机，把网络设置为DHCP。查看网络设置，是否和我们服务机的DHCP服务设定的相同。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNTcwMzY5_size_16_color_FFFFFF_t_70 1]  
*将网络改为DHCP模式*  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNTcwMzY5_size_16_color_FFFFFF_t_70 2]  
*DHCP服务器未开启服务，客户机无法获得IP*  
![在这里插入图片描述][2019012117260278.png]  
*DHCP服务器开启DHCP服务*  
![在这里插入图片描述][20190121172644784.png]  
*客户机获得了IP，可以看到DNS为7.7.7.7*  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNTcwMzY5_size_16_color_FFFFFF_t_70 3]  
说明DHCP服务搭建成功

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNTcwMzY5_size_16_color_FFFFFF_t_70]: /images/20220325/ce1c87a2da77440e888775ec501af735.png
[20190121160007752.png]: /images/20220325/415d6a8f352146e2949cf01b6c72f309.png
[2019012116022832.png]: /images/20220325/bbb24b1bcf934496aa9c7784f25d3657.png
[20190121160412138.png]: /images/20220325/6be72747e89446b7a9542a7dde9b9b80.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNTcwMzY5_size_16_color_FFFFFF_t_70 1]: /images/20220325/7eadeea9358946f7bd748db84b9f9580.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNTcwMzY5_size_16_color_FFFFFF_t_70 2]: /images/20220325/5845442b0d344992949a30a81d889390.png
[2019012117260278.png]: /images/20220325/91aab8ec1a79444cae65573db2f00659.png
[20190121172644784.png]: /images/20220325/5a5fec16e5124f2c8b88d04bdf652d4f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNTcwMzY5_size_16_color_FFFFFF_t_70 3]: /images/20220325/3d5a8bc492374d80b01d6fbef2beab49.png