《linux的DHCP》练习题

9^JC b,[:cz^T01)查看本系统是否安装DHCP服务软体

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参考答案:
-~%th
`8t*o/F0rpm -qa |grep dhcp

2.1)手工安装dhcp,下载SRPMS包
FNI&QAw-uY-a;e02.2)进行SOURCES目录,解开tar包LUPA开源社区-egcf0F0n
2.3)编译安装dhcp服务端LUPA开源社区%OH&u URt] R

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参考答案:
lMj^pr&i~0wget ftp://195.220.108.108/linux/fedora/updates/7/SRPMS/dhcp-3.0.5-42.fc7.src.rpmLUPA开源社区9J]4n,\7K|

cd /usr/src/redhat/SOURCESLUPA开源社区`'br*bb8^G d

tar xvzf dhcp-3.0.5.tar.gzLUPA开源社区/WS#H[ K8r;`#?o

"o2x'M-Y-N0Cu4l0cd dhcp-3.0.5

'z+A$j{*~;kS s0./configure;make;make installLUPA开源社区fi,Cr5?'bL0V

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3.1)在SOURCES目录下拷贝dhcpd.conf.sample到/etc,并更名为dhcpd.confLUPA开源社区5y@y
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3.2)在SOURCES目录下拷贝dhcpd.init到/etc/init.d,并更名为dhcpd
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F#z1T/f0`z03.3)向/etc/sysconfig/dhcpd文件中写入DHCPDARGS="eth0"
rTEo;A.d6j03.4)新建/var/state/dhcp/dhcpd.leases文件

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参考答案:LUPA开源社区#{2a1kWN"m
cp ../dhcpd.conf.sample /etc/dhcpd.conf

cp ../dhcpd.init /etc/init.d/dhcpdLUPA开源社区+Js
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cat > /etc/sysconfig/dhcpd

DHCPDARGS="eth0"LUPA开源社区 W2{y4r'c@,vQ

}b:VzZ%~7D&~l:RST0touch /var/state/dhcp/dhcpd.leasesLUPA开源社区*I4~$}8RY/?

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vBfDc7]i04.1)打开/etc/dhcpd.conf文件
MrN(S3U04.2)內部网段设定为 192.168.2.0/24 这一段
d*U u sRe04.3)router 为 192.168.2.1LUPA开源社区r#bZ|KM ~{
4.4)DNS主机的 IP 为黑龙江网通的202.97.224.68LUPA开源社区8bl4itp `![
4.5)DNS的search为ckhitler.org
7?'z\$L*L S$W2P?04.6)动态分配给客户端的IP地址为192.168.2.128到192.168.2.254
xqJ&_$`,b04.7)默认的租约为3天，最大为6天

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KJ Vs)lu oY%h0参考答案:LUPA开源社区%g~lg]3X*kdFi
vi /etc/dhcpd.conf

ddns-update-style interim;LUPA开源社区6? zn"pt&]l
ignore client-updates;LUPA开源社区(d-U)M9Zk2SE

subnet 192.168.2.0 netmask 255.255.255.0 {LUPA开源社区(cR8X'LE4N*\8EM

# --- default gateway
5o;\,yy-`N0        option routers                  192.168.2.1;
2yAUU3YS2bu0        option subnet-mask              255.255.255.0;

        option nis-domain               "ckhitler.org";LUPA开源社区 ntk.A$h9?4f
        option domain-name              "ckhitler.org";
o_.t r b0        option domain-name-servers      202.97.224.68;

        option time-offset              -18000; # Eastern Standard TimeLUPA开源社区+u6|o-xz[
#       option ntp-servers              192.168.1.1;
~8RJm U+Rjju0#       option netbios-name-servers     192.168.1.1;LUPA开源社区SP[zI2O,[Q+\5F
# --- Selects point-to-point node (default is hybrid). Don't change this unless
z.e9OvFU Hu GT0# -- you understand Netbios very wellLUPA开源社区'_"yXr&Rl U
#       option netbios-node-type 2;

#S{1|h$r)W0        range dynamic-bootp 192.168.2.128 192.168.2.254;LUPA开源社区Wn.r8h;L}
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        default-lease-time 259200;LUPA开源社区%H;Eg6aw
        max-lease-time 518400;

vT-U!p0r3O0        # we want the nameserver to appear at a fixed addressLUPA开源社区x9BEi VJ
        host ns {
!j(ue^0[0                next-server marvin.redhat.com;LUPA开源社区0kH%C8oel/J
                hardware ethernet 12:34:56:78:AB:CD;
.l g}4U'ZZ1SJ.M0                fixed-address 207.175.42.254;

vsL8zSg!l)h(_0        }
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s| {*P,N'R!N1B05.1)启动dhcpd服务
;e4R-u(b4w05.2)查看/var/log/messages文件LUPA开源社区2WH%u _vxB8T)p*~
5.3)查看监听的端口LUPA开源社区 J-g2tE0W

1SkYZ;`\0参考答案:LUPA开源社区0Zm`9Gld"~4X2XYN
service dhcpd restartLUPA开源社区d3HRX.Q0w

tail -n 30 /var/log/messages

netstat -tlunp

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s.C@mjp6|1d"J06.1)在客户端配置eth0为动态获取IP地址LUPA开源社区-` ^6z\#I%K1dh
6.2)重启网络LUPA开源社区8x;[-j.s/ln%?M"Cp]
6.3)查看resolv.conf文件LUPA开源社区S&L'zE#h[sRO U
6.4)查看路由
6e!N"w0@3W2{06.5)查看端口连接LUPA开源社区Kpjgn
6.6)查看dhclient-eth0.leases文件LUPA开源社区4o!Q%B@!BOold$w
6.7)查看服务端的dhcpd.leases文件LUPA开源社区 Qmdn`l

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L#i2Y8AvQb3J7gf0参考答案:LUPA开源社区N5EdJM4yB8gF@iB
vi /etc/sysconfig/network-scrīpts/ifcfg-eth0

BOOTPROTO=dhcp

service network restartLUPA开源社区;d t6~6kC#G

cat /etc/resolv.conf

route -n

.H@&J@&kee0netstat -tlunp

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

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cat /var/lib/dhcp/dhcpd.leases
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