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