Linux的DHCP习题

Linux的DHCP

1)查看本系统是否安装DHCP服务软体 参考答案:

rpm -qa |grep dhcp

2.1)手工安装dhcp,下载SRPMS包 2.2)进行SOURCES目录,解开tar包 2.3)编译安装dhcp服务端 参考答案:

wget ftp://195.220.108.108/Linux/Fedora/updates/7/SRPMS/dhcp-3.0.5-42.fc7.src.rpm

cd /usr/src/RedHat/SOURCES tar xvzf dhcp-3.0.5.tar.gz cd dhcp-3.0.5

./configure;make;make install

3.1)在SOURCES目录下拷贝dhcpd.conf.sample到/etc,并更名为dhcpd.conf 3.2)在SOURCES目录下拷贝dhcpd.init到/etc/init.d,并更名为dhcpd 3.3)向/etc/sysconfig/dhcpd文件中写入DHCPDARGS=\3.4)新建/var/state/dhcp/dhcpd.leases文件 参考答案:

cp ../dhcpd.conf.sample /etc/dhcpd.conf cp ../dhcpd.init /etc/init.d/dhcpd cat > /etc/sysconfig/dhcpd DHCPDARGS=\

touch /var/state/dhcp/dhcpd.leases

4.1)打开/etc/dhcpd.conf文件

4.2)內部网段设定为 192.168.2.0/24 这一段 4.3)router 为 192.168.2.1

4.4)DNS主机的 IP 为黑龙江网通的202.97.224.68 4.5)DNS的search为ckhitler.org

4.6)动态分配给客户端的IP地址为192.168.2.128到192.168.2.254 4.7)默认的租约为3天，最大为6天 参考答案: vi /etc/dhcpd.conf ddns-update-style interim; ignore client-updates;

subnet 192.168.2.0 netmask 255.255.255.0 { # --- default gateway

option routers 192.168.2.1; option subnet-mask 255.255.255.0; option nis-domain \ option domain-name \ option domain-name-servers 202.97.224.68; option time-offset -18000; # Eastern Standard Time # option ntp-servers 192.168.1.1; # option netbios-name-servers 192.168.1.1;

# --- Selects point-to-point node (default is hybrid). Don't change this unless

# -- you understand Netbios very well

# option netbios-node-type 2;

range dynamic-bootp 192.168.2.128 192.168.2.254; default-lease-time 259200; max-lease-time 518400;

# we want the nameserver to appear at a fixed address host ns {

next-server marvin.RedHat.com; hardware ethernet 12:34:56:78:AB:CD; fixed-address 207.175.42.254; } }

5.1)启动dhcpd服务

5.2)查看/var/log/messages文件 5.3)查看监听的端口 参考答案:

service dhcpd restart tail -n 30 /var/log/messages netstat -tlunp

6.1)在客户端配置eth0为动态获取IP地址 6.2)重启网络

6.3)查看resolv.conf文件 6.4)查看路由 6.5)查看端口连接

6.6)查看dhclient-eth0.leases文件

6.7)查看服务端的dhcpd.leases文件 参考答案:

vi /etc/sysconfig/network-scrīpts/ifcfg-eth0 BOOTPROTO=dhcp service network restart cat /etc/resolv.conf route -n netstat -tlunp

cat /var/lib/dhcp/dhclient-eth0.leases cat /var/lib/dhcp/dhcpd.leases

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