DNS配置 for centos7 1、安装DNS服务 [root@dns-server ~]# yum install bind bind-utils -y 2、配置主配置文件 [root@dns-server ~]# cat /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. // // See the BIND Administrator's Reference Manual (ARM) for details about the // configuration located in /usr/share/doc/bind-{version}/Bv9ARM.html options { listen-on port 53 { 127.0.0.1; any; }; //有变更 // 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 { localhost; any; }; allow-transfer { 223.5.5.5;}; //允许转发 forward first ; forwarders { 223.5.5.5;}; /* - If you are building an AUTHORITATIVE DNS server, do NOT enable recursion. - If you are building a RECURSIVE (caching) DNS server, you need to enable recursion. - If your recursive DNS server has a public IP address, you MUST enable access control to limit queries to your legitimate users. Failing to do so will cause your server to become part of large scale DNS amplification attacks. Implementing BCP38 within your network would greatly reduce such attack surface */ recursion yes; dnssec-enable no; dnssec-validation no; /* Path to ISC DLV key */ bindkeys-file "/etc/named.root.key"; managed-keys-directory "/var/named/dynamic"; pid-file "/run/named/named.pid"; session-keyfile "/run/named/session.key"; }; logging { channel default_debug { file "data/named.run"; severity dynamic; }; }; zone "." IN { type hint; file "named.ca"; }; //正向解析 zone "niraya.org" IN { type master; file "forward.niraya.org"; allow-update { none; }; }; //反向解析 zone "18.21.172in-addr.arpa" IN { type master; file "reverse.niraya.org"; allow-update { none; }; }; include "/etc/named.rfc1912.zones"; include "/etc/named.root.key"; #正向解析文件配置 [root@dns-server ~]# cat /var/named/forward.niraya.org $TTL 86400 @ IN SOA masterdns.niraya.org. root.niraya.org. ( 2021060116 ;Serial 3600 ;Refresh 1800 ;Retry 604800 ;Expire 86400 ;Minimum TTL ) @ IN NS masterdns.niraya.org. @ IN A 172.21.18.138 masterdns IN A 172.21.18.138 docs 600 IN A 172.21.18.149 wiki IN A 172.21.18.149 ftp 600 IN A 172.21.18.136 #反向解析文件配置 [root@dns-server ~]# cat /var/named/reverse.niraya.org $TTL 86400 @ IN SOA masterdns.niraya.org. root.niraya.org. ( 2021060116 ;Serial //时间 3600 ;Refresh 1800 ;Retry 604800 ;Expire 86400 ;Minimum TTL ) @ IN NS masterdns.niraya.org. @ IN PTR niraya.org. masterdns IN A 172.21.18.138 docs IN A 172.21.18.149 wiki IN A 172.21.18.149 ftp IN A 172.21.18.136 138 IN PTR masterdns.niraya.org. 149 IN PTR wiki.niraya.org. 149 IN PTR docs.niraya.org. 136 IN PTR ftp.niraya.org. [root@dns-server ~]# systemctl restart named //重启生效