Linux DNS and DHCP Configuration

Let's take a look at the linux System DNS and DHCP configurations. I hope this article will be helpful to you.

Install

Yum install bind-chroot bind-libs bind-utils caching-nameserver system-config-bind

Set the Security enable path

Vi/etc/sysconfig/named

ROOTDIR =/var/named/chroot

Main configuration file

Vi/var/named/chroot/etc/named. conf

Main server path

/Var/named/chroot/var/named/

Secondary server path

/Var/named/chroot/var/named/slave

Complete Set content, can be directly ?? Paste it and make some modifications to use it (below -- for secondary servers)

Vi/var/named/chroot/etc/named. conf

------------------- Main server -----

Options {
Directory "/var/named ";
Dump-file "/var/named/data/cache_dump.db ";
Statistics-file "/var/named/data/named_stats.txt ";
Memstatistics-file "/var/named/data/named_mem_stats.txt ";
Allow-query {any ;};
Recursion yes;

Forwarders {
163.28.136.14;
163.28.136.2;
163.28.136.10;
};

Allow-transfer {
163.28.136.14;
163.28.136.2;
163.28.136.10;
};

};

Controls {
Inet 127.0.0.1 allow {localhost;} keys {rndckey ;};
};

Logging {
Channel default_debug {
File "data/named. run ";
Severity dynamic;
};
};

Zone "." IN {
Type hint;
File "named. ca ";
};

Zone "localdomain" IN {
Type master;
File "localdomain. zone ";
Allow-update {none ;};
};

Zone "localhost" IN {
Type master;
File "localhost. zone ";
Allow-update {none ;};
};

Zone "0.0.127.in-addr. arpa" IN {
Type master;
File "named. local ";
Allow-update {none ;};
};

Zone "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {
Type master;
File "named. ip6.local ";
Allow-update {none ;};
};

Zone "255. in-addr.arpa" IN {
Type master;
File "named. broadcast ";
Allow-update {none ;};
};

Zone "0. in-addr.arpa" IN {
Type master;
File "named. zero ";
Allow-update {none ;};
};

Zone "school.kh.edu.tw" IN {
Type master;
File "named. school ";
Allow-update {none ;};
};

Zone "x.32.163.in-addr. arpa" IN {
Type master;
File "named. school. rev ";
Allow-update {none ;};
};

Include "/etc/rndc. key ";

------------------- Secondary server -----

Options {
Listen-on port 53 {any ;};
Listen-on-v6 port 53 {: 1 ;};
Directory "/var/named ";
Dump-file "/var/named/data/cache_dump.db ";
Statistics-file "/var/named/data/named_stats.txt ";
Memstatistics-file "/var/named/data/named_mem_stats.txt ";
Allow-query {any ;};
Recursion yes;

Forwarders {
163.28.136.14;
163.28.136.2;
163.28.136.10;
};

};

Controls {
Inet 127.0.0.1 allow {localhost;} keys {rndckey ;};
};

Logging {
Channel default_debug {
File "data/named. run ";
Severity dynamic;
};
};

Zone "." IN {
Type hint;
File "named. ca ";
};

Zone "localdomain" IN {
Type master;
File "localdomain. zone ";
Allow-update {none ;};
};

Zone "localhost" IN {
Type master;
File "localhost. zone ";
Allow-update {none ;};
};

Zone "0.0.127.in-addr. arpa" IN {
Type master;
File "named. local ";
Allow-update {none ;};
};

Zone "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {
Type master;
File "named. ip6.local ";
Allow-update {none ;};
};

Zone "255. in-addr.arpa" IN {
Type master;
File "named. broadcast ";
Allow-update {none ;};
};

Zone "0. in-addr.arpa" IN {
Type master;
File "named. zero ";
Allow-update {none ;};
};

Zone "school.kh.edu.tw" IN {
Type slave;
File "slave/named. x. rev ";
Masters {
163. 32. Code. 1;
};
};

Zone "code. 32.163.in-addr. arpa" IN {
Type slave;
File "slave/named. sxhool. rev ";
Masters {
163. 32. Code. 1;
};
};

Include "/etc/rndc. key ";

Restart bKjia. c0m

Service named restart

Check whether there are two files: named. x. rev Reverse Solution and named. x positive solution.

Cd/var/named/chroot/var/named/

The content of the secondary server will be updated with the primary server, and the primary server will be regularly maintained. The secondary server will be in urgent use!

---------- Named. shsps ----------

$ TTL 86400
@ In soa x.kh.edu.tw. root.x.kh.edu.tw (
2010052730; serial
1 H; refresh
15; retry
14D; expire
12 H; Minimum 111cn. Net
)

@ In mx 1 mail.x.kh.edu. t
@ In ns x.kh.edu.tw.
@ In ns dns.x.kh.edu.tw.
@ In a 163.32.x.1
Dns in a 163.32.x.1
Ftp in a 163.32.x.2

Www in cname ftp.x.kh.edu.tw.

---------- Named. shsps. rev ---------- set the format

$ TTL 86400
@ In soa x.kh.edu.tw. root.x.kh.edu.tw .(
2010052710; serial
1 H; refresh
15; retry
14D; expire
12 H; Minimum
)
@ In ns x.kh.edu.tw.
@ In ns dns.x.kh.edu.tw.
1 in ptr x.kh.edu.tw.
2 in ptr www.x.kh.edu.tw.
 
DHCP server
Installer

Yum-y install dhcp *

Set file note: all network cards must be set

Vi/etc/dhcpd. conf

Ddns-update-style interim;
Ignore client-updates;

Subnet 163.32.x.0 netmask 255.255.255.0 {
}

Subnet 192.168.1.0 netmask 255.255.255.0 {
}

Subnet 192.168.2.0 netmask 255.255.255.0 {

# --- Default gateway
Option routers 192.168.1.1;
Option subnet-mask limit 255.0;
Option broadcast-address 192.168.1.255;

Option domain-name "dns.xxx.kh.edu.tw ";
Option domain-name-servers 163.32.x.1, 140.117.11.1, 168.95.1.1;
Option netbios-name-servers 163.32.x.1;
Option time-offset-18000; # Eastern Standard Time
Option netbios-node-type 8;
Range dynamic-bootp 192.168.1.11 192.168.1.239;
Default-lease-time 216000;
Max-lease-time 432000;

# We want the nameserver to appear at a fixed address fixed host IP

Host shsps00001 {
Hardware ethernet 00: 13: d4: 9c: 3d: 6a;
Fixed-address 163.32.x.10;
}

}

 

Set the Default GATEWAY

Vi/etc/sysconfig/network

NETWORKING = yes
NETWORKING_IPV6 = yes
HOSTNAME = hostname.kh.edu.tw
GATEWAY = 163.32.x.254

Restart the network

Service network restart

Query server lease files

Vi/var/lib/dhcpd. leases