Article Directory
- 1. DNS reverse resolution
- Second, build a master-slave domain name server
-
- 1. Modify the zone configuration file of the primary domain name server, modify the forward and reverse zone configuration
- 2. Modify the master configuration file of the slave domain name server
- 3. Modify the zone configuration file from the domain name server, add positive and negative zone configuration
- 4. Both the master and slave restart the service, turn off the firewall, and check whether the area data file has been downloaded successfully
- 5. Add the slave DNS server address in the client's domain name resolution configuration file
- 6. Test
1. DNS reverse resolution
1. Install bind
2. Find the configuration file path
3. Configure reverse analysis
1. Edit the main configuration file
vim /etc/named.conf
options {
listen-on-v6 poet 53 { any; }; #监听53端口，IP地址使用提供服务的本地IP，也可用any代表所有
# listen-on-v6 port 53 { : :1; }; #ipv6注释掉或者删除
directory "/var/named"; #区域数据文件的默认存放位置
dump- file "/var/ named/data/cache_ dump . db"; #域名缓存数据库文件的位置
statistics-file "/var/named/data/named stats.txt"; #状态统计文件的位置
memstatistics-file "/var/named/data/named_ mem_ stats. txt"; #内存统计文件的位置
allow-query { any; }; #允许使用本DNS解析服务的网段，也可用any代表所有
2. Modify zone configuration file, add reverse zone configuration
vim /etc/named.rfc1912.zones #文件里有模版，可复制粘贴后修改
zone "172.168.192.in-addr.arpa" IN { #反向解析的地址倒过来写，代表解析192.168.172段的地址
type master;
file "zhangsan.com.zone.local"; #指定区域数据文件为zhangsan.com.zone.local
allow-update { none; };
};
3. Configure the reverse zone data file
d /var/named/
cp -p named.localhost zhangsan.com.zone.local
vim /var/named/zhangsan.com.zone.local
$TTL 1D
@ IN SOA zhangsan.com. admin.zhangsan.com. ( #这里的“@”代表192.168.172段地址
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS zhangsan.com.
A 192.168.172.10
20 IN PTR www.zhangsan.com.
#PTR为反向指针，反向解析192.168.172.10地址结果为www.zhangsan.com.
4. Restart the service to test
systemctl restart named
host 192.168.132.20
nslookup 192.168.132.20
Second, build a master-slave domain name server
1. Modify the zone configuration file of the primary domain name server, modify the forward and reverse zone configuration
vim /etc/ named. rfc1912. zone
zone "kgc.com" IN {
type master; #类型为主区域
file "kgc.com.zone";
allow-transfer { 192.168.132.10; } ; #允许从服务器下载正向区域数据，这里添从服务器的IP地址
};
zone "132.168.192.in-addr.arpa" IN {
type master;
file "kgc.com.zone.local";
allow-transfer { 192.168.132.10; } ;
};
2. Modify the master configuration file of the slave domain name server
yum -y install bind
vim /etc/named.conf
options {
listen-on port 53 { any; }; #监听53端口，ip地址使用提供服务的本地IP即可，也可用any代表所有
# 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";
recursing-file "/var/named/data/named.recursing";
secroots-file "/var/named/data/named.secroots";
allow-query { any; }; #允许使用本DNS解析服务的网段，也可用any代表所有
……
3. Modify the zone configuration file from the domain name server, add positive and negative zone configuration
vim /etc/named.rfc1912.zones
zone "kgc.com" IN {
type slave; #类型为从区域
masters { 192.168.132.20; }; #指定主服务器的IP地址
file "slaves/zhangsan.com.zone"; #下载的区域数据文件保存到slaves/目录下
};
zone "132.168.192.in-addr.arpa" IN {
type slave;
masters { 192.168.132.20; };
file "slaves/zhangsan.com.zone.local";
};
4. Both the master and slave restart the service, turn off the firewall, and check whether the area data file has been downloaded successfully
systemctl restart named
systemctl stop firewalld
setenforce 0
ls -l /var/named/slaves/
5. Add the slave DNS server address in the client's domain name resolution configuration file
echo "nameserver 192.168.132.10" >> /etc/resolv.conf
echo "nameserver 192.168.132.20" >> /etc/resolv.conf
6. Test
host 192.168.132.21
nslookup 192.168.132.22
#停止主服务器的服务，模拟主服务器故障
systemctl stop named
host 192.168.132.21
nslookup 192.168.132.22
