Kali Linux常用服务配置教程获取IP地址

Kali Linux常用服务配置教程获取IP地址

下面以Kali Linux为例，演示获取IP地址的方法

（1）设置网络接口为自动获取IP地址。在Kali Linux的收藏夹中单击图标，将显示所有的程序，如图1.8所示。

（2）单击“设置”图标，将打开“设置”窗口，如图1.9所示。

（3）选择“网络”选项，单击有线连接中的齿轮按钮，将显示“有线”对话框，如图1.10所示。

（4）勾选“自动连接”复选框。然后，单击IPv4标签，将显示IPv4选项卡，如图1.11所示。

（5）在该界面选择“自动(DHCP)”选项。然后，单击“应用”按钮。接下来，就可以请求获取IP地址了。执行命令如下所示：

root@daxueba:~# dhclient eth0 –d

Internet Systems Consortium DHCP Client 4.3.5

Copyright 2004-2016 Internet Systems Consortium.

All rights reserved.

For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/eth0/00:0c:29:25:89:95

Sending on   LPF/eth0/00:0c:29:25:89:95

Sending on   Socket/fallback

DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4

DHCPREQUEST of 192.168.0.12 on eth0 to 255.255.255.255 port 67

DHCPOFFER of 192.168.0.12 from 192.168.0.10

DHCPACK of 192.168.0.12 from 192.168.0.100

bound to 192.168.0.12 -- renewal in 277 seconds.

从输出的信息中，可以看到成功获取到IP地址192.168.0.12。由此可以说明，搭建的DHCP服务测试成功。此时，用户查看地址租约文件dhcpd.leases，也可以看到分配的IP地址。如下所示：

root@daxueba:~# cat /var/lib/dhcp/dhcpd.leases

# The format of this file is documented in the dhcpd.leases(5) manual page.

# This lease file was written by isc-dhcp-4.3.5

# authoring-byte-order entry is generated, DO NOT DELETE

authoring-byte-order little-endian;

lease 192.168.0.10 {

  starts 1 2018/07/02 10:15:00;

  ends 1 2018/07/02 10:25:00;

  cltt 1 2018/07/02 10:15:00;

  binding state active;

  next binding state free;

  rewind binding state free;

  hardware ethernet 00:0c:29:5c:ae:aa;

  client-hostname "daxueba";

}

lease 192.168.0.11 {

  starts 1 2018/07/02 10:18:17;

  ends 1 2018/07/02 10:28:17;

  cltt 1 2018/07/02 10:18:17;

  binding state active;

  next binding state free;

  rewind binding state free;

  hardware ethernet 00:0c:29:99:92:4f;

  uid "010014)231222O";

  set vendor-class-identifier = "MSFT 5.0";

  client-hostname "Test";

}

lease 192.168.0.12 {

  starts 1 2018/07/02 10:34:56;

  ends 1 2018/07/02 10:44:56;

  cltt 1 2018/07/02 10:34:56;

  binding state active;

  next binding state free;

  rewind binding state free;

  hardware ethernet 00:0c:29:25:89:95;

  client-hostname "daxueba";

}

从输出的信息中，可以看到DHCP服务分配出去的IP地址及对应租约信息。