Linux dns Server Configuration

Common commands and troubleshooting tools:

View Processes

Ps aux | grep named

Start

Service named start (centos)

/Usr/local/bind/sbin/named-4 (redhat)

Kill

Killall named

View port

Netstat-ano | grep 53

Detection

Nslookup

Dig

Dig-x

Change dns

Vi/etc/resolv. conf

Change Nic

Vi/etc/sysconfig/network-scripts/ifcfg-eth0

Centos System (then you will be happy, you can use yum to install, redhat directly pull down ):

I. Installation
# Rpm-qa | grep bind
# Rpm-qa | grep caching

# Yum install caching-nameserver

OK, centos is installed.

Check:

# Service named start

[Root @ localhost named] # ps aux | grep named
Named 14011 4.0 0.2 38852 3380? Ssl/usr/sbin/named-u named-c/etc/named. caching-nameserver.conf-t/var/named/chroot
Root 14021 0.0 0.0 4784 704 pts/1 R + grep named

Note: red and blue

Our named service configuration file is:/etc/named. caching-nameserver.conf

The zone file should be stored in:/var/named/chroot/var/named/

Ii. Configuration

Please explain it first, or you may be dizzy when you look at these configuration files:

192.168.10.62 will be our dns Server
192.168.10.188 will be our slave server

Abc. zone. db forward statement File

Reverse file Decoding for named.192.168.10

Service configuration file:

[Root @ localhost named] # vi/etc/named. caching-nameserver.conf

//
// Named. conf
//
// Provided by Red Hat bind package to configure the isc bind named (8) DNS
// Server as a caching only nameserver (as a localhost DNS resolver only ).
//
// See/usr/share/doc/bind */sample/for example named configuration files.
//

Options {
Listen-on port 53 {192.168.10.0/24 ;};
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 {192.168.10.0/24 ;};
Allow-query-cache {192.168.10.0/24 ;};
Recursion yes;

};

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

Zone "." IN {

Type hint;
File "/var/named. ca ";
};

Zone "mx1985.com." IN {

Type master;

File "/var/named/mx1985.zone. db ";
Allow-transfer {192.168.10.188 ;};
};

Zone "abc.com." IN {

Type master;

File "/var/named/abc. zone. db ";
Allow-transfer {192.168.10.188 ;};
};

Zone "10.168.192.in-addr. arpa" IN {
Type master;
File "/var/named/named.192.168.10 ";
Allow-transfer {192.168.10.188 ;};
};

Positive Solution file:

[Root @ localhost named] # vi/var/named/chroot/var/named/abc. zone. db

$ TTL 1D
@ In soa @ rname. invalid .(
0; serial
1D; refresh
1 H; retry
1 W; expire
3 H); minimum
In ns abc.com.
In ns slave.abc.com.
Abc.com. in a 192.168.10.62
Slave.abc.com. in a 192.168.10.188

Www in a 192.168.10.188
Aaa in a 192.168.10.188
Bbb in a 192.168.10.62

Reverse file:

[Root @ localhost named] # vi/var/named/chroot/var/named/named.192.168.10

$ TTL 1D
@ In soa @ rname. invalid .(
0; serial
1D; refresh
1 H; retry
1 W; expire
3 H); minimum
In ns abc.com.
In ns slave.abc.com.
62 in ptr abc.com.
188 in ptr slave.abc.com.

188 in ptr www.abc.com.
188 in PTR aaa.abc.com.
62 in PTR bbb.abc.com.
~
~

The redhat system is used as the slave service configuration (Please pull down the redhat configuration as the master server ):

We use 192.168.10.188 as the Server Load balancer instance. Now we can configure it.

Because I use RedHat, the installation instructions are as follows:

Let me share it.Installation Package

Http://pan.baidu.com/share/link? Consumer id = 90714652 & UK = 3222060313

# Tar-zxvf bind-9.9.2.tar.gz

# Cd bind-9.9.2

#./Configure -- prefix =/usr/local/bind -- enable-threads -- With-dlz-MySQL

# Make

# Make install

Generate basic configuration file

#/Usr/local/bind/sbin/rndc-confgen>/usr/local/bind/etc/rndc. conf

# Tail-10 rndc. conf | head-9 | sed S/# \ // G> named. conf

Start

#/Usr/local/bind/sbin/named-4

Okay. Go to the slavedns configuration. Pay special attention to the path of this system.

Create a Server Load balancer directoryUsed to store zone files,

# Mkdir/usr/local/bind/etc/slaves

# Chmod 777-R slaves/

# Chown-R named. named slaves/

# Ll-d slaves
Drwxrwxrwx 2 named 4096 Jul 25 slaves (that's right)

[Root @ localhost etc] # vi named. conf

Key "rndc-key "{
Algorithm hmac-md5;
Secret "XfiakRq8MCb3uC6XwKDLQQ = ";
};

Controls {
Inet 127.0.0.1 port 953
Allow {127.0.0.1;} keys {"rndc-key ";};
};
Zone "." IN {

Type hint;
File "/usr/local/bind/etc/named. ca ";

};

Zone "abc.com." IN {

Type slave;

File "Slaves/ABC. Zone. DB ";

Masters {192.168.10.62 ;};

};

Zone "10.168.192.in-ADDR. Arpa" in {
Type slave;
File "Slaves/named.192.168.10 ";

Masters {192.168.10.62 ;};
};

Restart, and the zone file shared by the master will come.
#/Usr/local/bind/sbin/named-4

[Root @ localhost etc] # ll slaves/
Total 8
-RW-r -- 1 Root 349 Jul 25 14:18 ABC. Zone. DB
-RW-r -- 1 Root 446 Jul 25 14:38 named.192.168.10

Now we configure a master DNS server under RedHat, excluding the slave service.

Named. conf

[Root @ rhes6 ~] # Vi/usr/local/bind/etc/named. conf

//
// Named. conf
//
// Provided by Red Hat Bind package to configure the isc bind named (8) DNS
// Server as a caching only nameserver (as a localhost DNS resolver only ).
//
// See/usr/share/doc/Bind */sample/For example named configuration files.
//

Options {
Listen-on port 53 {192.168.10.0/24 ;};
Listen-on-v6 port 53 {: 1 ;};
Directory "/usr/local/bind/etc /";
PID-file "/usr/local/bind/var/run/named. PID ";
Allow-query {192.168.10.0/24 ;};
Allow-query-Cache {192.168.10.0/24 ;};
Recursion yes;
Allow-transfer {none ;};
};

Include "/usr/local/bind/etc/rndc. Key ";
Zone "." In {

Type hint;
File "/usr/local/bind/etc/named. ca ";

};

Zone "mx1985.com." In {

Type master;

File "mx1985.zone. DB ";

};

Zone "abc.com." In {

Type master;

File "abc. zone. db ";

};

Zone "10.168.192.in-addr. arpa" IN {
Type master;
File "named.192.168.10 ";
};

Forward statement File

[Root @ rhes6 ~] # Vi/usr/local/bind/etc/abc. zone. db

$ TTL 1D
@ In soa @ rname. invalid .(
0; serial
1D; refresh
1 H; retry
1 W; expire
3 H); minimum
In ns abc.com.
A 192.168.10.185

Www in a 192.168.10.188
Aaa in a 192.168.10.188
Bbb in a 192.168.10.188

Reverse file:

~
[Root @ rhes6 ~] # Vi/usr/local/bind/etc/named.192.168.10

$ TTL 1D
@ In soa @ rname. invalid .(
0; serial
1D; refresh
1 H; retry
1 W; expire
3 H); Minimum
In NS abc.com.
PTR 192.168.10.185

188 in PTR www.abc.com.
188 in PTR aaa.abc.com.

188 in PTR bbb.abc.com.

Change the DNS of all machines to the two servers.

# Vi/etc/resolv. conf

Mastername 192.168.10.62

Mastername 192.168.10.188