Centos7搭建DNS服務器
- 2020 年 4 月 1 日
- 筆記
#1.安裝bind軟件 yum install bind -y
[root@localhost named]# vi /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 { 192.168.1.7; }; 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; }; /* - 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 yes; dnssec-validation yes; /* 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"; }; include "/etc/named.rfc1912.zones"; include "/etc/named.root.key"; [root@localhost named]#
vi /etc/named.rfc1912.zones
在最後加上：
//正向區域配置 zone "xiaochangwei.com" IN { type master; file "xiaochangwei.com.zone"; allow-update { none; }; }; //反向區域配置 zone "1.168.192.in-addr.arpa" IN { type master; file "xiaochangwei.com.local"; allow-update { none; }; };
進入/var/named
cp -p named.empty xiaochangwei.com.zone
vi xiaochangwei.com.zone
$TTL 1D @ IN SOA @ rname.invalid. ( 0 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum NS @ A 192.168.1.7 www IN A 192.168.1.6 ftp IN A 192.168.1.6 mail IN CNAME www
vi xiaochangwei.com.local
$TTL 1D @ IN SOA @ rname.invalid. ( 0 ; serial 1D ; refresh 1H ; retry 1W ; expire 3H ) ; minimum NS @ A 192.168.1.7 6 IN PTR www.xiaochangwei.com. #最前面的6代表ip的最後一位，因為在named.rfc1912.zones反向配置中，倒敘配置了ip前三位，所以這裡就相當於說192.168.1.6解析到www.xiaochangwei.com這個域名 9 IN PTR www.zycloud.info. #同理，192.168.1.9就會解析到 www.zycloud.info這個域名。 注意域名後面有個點，不能省略
systemctl restart named systemctl enable named
換一台電腦DNS設置為DNS服務器地址（192.168.1.7）
[root@1-5 ~]# nslookup ftp.xiaochangwei.com Server: 192.168.1.7 Address: 192.168.1.7#53 Name: ftp.xiaochangwei.com Address: 192.168.1.6 [root@1-5 ~]# [root@1-5 ~]# nslookup www.xiaochangwei.com Server: 192.168.1.7 Address: 192.168.1.7#53 Name: www.xiaochangwei.com Address: 192.168.1.6 [root@1-5 ~]#
若提示nslookup沒安裝，執行下面命令進行安裝
yum install bind-utils -y
[root@1-5 ~]# nslookup 192.168.1.6 6.1.168.192.in-addr.arpa name = www.xiaochangwei.com. [root@1-5 ~]#
需要注意的是：配置客戶機的DNS的時候不要在 /etc/resolv.conf中配置，不然重啟後會被覆蓋，
應該在/etc/sysconfig/network-scripts/ifcfg-*中配置，啟動的時候會自動生成到resolv.conf中的
[root@1-5 ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33 |grep DNS DNS1=192.168.1.7 [root@1-5 ~]#
