为了账号安全,请及时绑定邮箱和手机立即绑定
  • 反向解析:dig -x 网址IP地址 @DNS地址 #dig -x 14.215.177.38 @114.114.114.119 ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6 <<>> -x 14.215.177.38 @114.114.114.119 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 9439 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;38.177.215.14.in-addr.arpa. IN PTR ;; AUTHORITY SECTION: 215.14.in-addr.arpa. 3090 IN SOA soa. dns.guangzhou.gd.cn. 2016012109 10800 3600 604800 86400 ;; Query time: 124 msec ;; SERVER: 114.114.114.119#53(114.114.114.119) ;; WHEN: Mon Aug 29 20:49:37 2016 ;; MSG SIZE rcvd: 102
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  • 正向解析:dig @DNS地址 网址域名 #dig @114.114.114.119 www.baidu.com ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6 <<>> @114.114.114.119 www.baidu.com ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3534 ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.baidu.com. IN A ;; ANSWER SECTION: www.baidu.com. 1177 IN CNAME www.a.shifen.com. www.a.shifen.com. 69 IN A 14.215.177.38 www.a.shifen.com. 69 IN A 14.215.177.37 ;; Query time: 51 msec ;; SERVER: 114.114.114.119#53(114.114.114.119) ;; WHEN: Mon Aug 29 20:47:08 2016 ;; MSG SIZE rcvd: 90
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  • #nslookup www.baidu.com Server:114.114.114.119 Address:114.114.114.119#53 Non-authoritative answer: www.baidu.com canonical name = www.a.shifen.com. Name:www.a.shifen.com Address:14.215.177.37 Name:www.a.shifen.com Address:14.215.177.38 nslookup可以进入交互模式单独查找SOA,A等等记录 #nslookup >set q=soa >baidu.com Server:114.114.114.119 Address:114.114.114.119#53 Non-authoritative answer: baidu.com origin = dns.baidu.com mail addr = sa.baidu.com serial = 2012132847 refresh = 300 retry = 300 expire = 2592000 minimum = 7200 Authoritative answers can be found from: >set q=a >baidu.com Server:114.114.114.119 Address:114.114.114.119#53 Non-authoritative answer: Name:baidu.com Address:180.149.132.47 Name:baidu.com Address:123.125.114.144 Name:baidu.com Address:111.13.101.208 Name:baidu.com Address:220.181.57.217
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  • #host www.baidu.com #host -t SOA baidu.com baidu.com has SOA record dns.baidu.com. sa.baidu.com. 2012132847 300 300 2592000 7200 #host -t NS baidu.com baidu.com name server dns.baidu.com. baidu.com name server ns2.baidu.com. baidu.com name server ns3.baidu.com. baidu.com name server ns4.baidu.com. baidu.com name server ns7.baidu.com. #host -t A baidu.com baidu.com has address 220.181.57.217 baidu.com has address 123.125.114.144 baidu.com has address 111.13.101.208 baidu.com has address 180.149.132.47
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  • host文件位置:/etc/resolv.conf # host www.baidu.com www.baidu.com is an alias for www.a.shifen.com. www.a.shifen.com has address 14.215.177.38 www.a.shifen.com has address 14.215.177.37 #nslookup www.baidu.com Server: 114.114.114.119 Address: 114.114.114.119#53 Non-authoritative answer: www.baidu.com canonical name = www.a.shifen.com. Name: www.a.shifen.com Address: 14.215.177.38 Name: www.a.shifen.com Address: 14.215.177.37 #dig www.baidu.com ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6 <<>> www.baidu.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33977 ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.baidu.com. IN A ;; ANSWER SECTION: www.baidu.com. 546 IN CNAME www.a.shifen.com. www.a.shifen.com. 199 IN A 14.215.177.38 www.a.shifen.com. 199 IN A 14.215.177.37 ;; Query time: 42 msec ;; SERVER: 114.114.114.119#53(114.114.114.119) ;; WHEN: Mon Aug 29 20:33:36 2016 ;; MSG SIZE rcvd: 90
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  • Bind服务常用客户端工具: 1.nslookup:支持多平台,应用广泛(使用简单、易懂) 2.dig:常用于linux系统(比较专业) 3.host:较多(简单、明了)
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  • 逆向解析重点总结: 1.逆向解析域in-addr.arpa的书写格式 2.常用于邮件服务的域名解析 3.配置文件权限需要named用户可读取,没有权限启动named服务会报错 -rw-r--r--. 1 root root 191 Aug 29 19:40 192.168.199.zone -rw-r--r--. 1 root root 202 Aug 29 17:12 iaskjob.com.zone -rw-r--r--. 1 root root 219 Aug 29 19:43 imooc.com.zone
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  • 实战场景3代码: 1.编辑/var/named/imooc.com.zone文件 $TTL 7200 imooc.com. IN SOA imooc.com. ho.imooc.com. (222 1H 15M 1W 1D) imooc.com. IN NS dns1.imooc.com. dns1.imooc.com. IN A 192.168.199.202 www.imooc.com. IN A 117.121.101.41 @ IN MX 10 mail mail IN A 192.168.199.203 2.重启named服务 service named restart 3.正向解析本机检测 dig @127.0.0.1 mail.imooc.com 4.配置反向解析域,编辑/etc/named.conf文件 options{ directory "/var/named"; }; zone "imooc.com"{ type master; file "imooc.com.zone"; }; zone "iaskjob.com"{ type master; file "iaskjob.com.zone"; }; zone "199.168.192.in-addr.arpa"{ type master; file "192.168.199.zone"; }; 5.编辑/var/named/192.168.199.zone文件 $TTL 3600 @ IN SOA 199.168.192.in-addr.arpa. iaskjob.163.com. ( 2014012200 1H 15M 1W 1D ) @ IN NS dns1.imooc.com. 202 IN PTR dns1.imooc.com. 203 IN PTR mail.imooc.com. 6.重启named服务 service named restart 7.反向解析本机测试 dig -x 192.168.199.203 @127.0.0.1
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  • 实战场景3
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  • 正向解析与反向解析: 正向解析:通过域名查找IP(A记录) 反向解析:通过IP查找对应域名(PTR记录)
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  • 实战场景1代码: 1.将原有/etc/named.conf文件更名备份 mv /etc/named.conf /etc/named.conf_default 2.创建/etc/named.conf文件并编辑 vim /etc/named.conf options{ directory "/var/named"; }; zone "imooc.com"{ type master; file "imooc.com.zone"; }; 3.创建/var/named/imooc.com.zone文件并编辑 vim /var/named/imooc.com.zone $TTL 7200 imooc.com. IN SOA imooc.com. ho.imooc.com. (222 1H 15M 1W 1D) imooc.com. IN NS dns1.imooc.com. dns1.imooc.com. IN A 192.168.199.202 www.imooc.com. IN A 2.2.2.2 4.重启named服务 service named restart 5.本机测试 dig @192.168.199.202 www.imooc.com 补充:重启服务如有报错查看/var/log/messages tail -f /var/log/messages
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  • 实战场景2代码: 1.先ping imooc的ip ping www.imooc.com-->117.121.101.40 2.修改/var/named/imooc.com.zone文件,将www的A记录IP地址替换成imooc的IP地址 $TTL 7200 imooc.com. IN SOA imooc.com. ho.imooc.com. (222 1H 15M 1W 1D) imooc.com. IN NS dns1.imooc.com. dns1.imooc.com. IN A 192.168.199.202 www.imooc.com. IN A 117.121.101.41 3.修改/etc/named.conf文件,添加zone "iaskjob.com" options{ directory "/var/named"; }; zone "imooc.com"{ type master; file "imooc.com.zone"; }; zone "iaskjob.com"{ type master; file "iaskjob.com.zone"; }; 4.新建iaskjob.com.zone文件并编辑 vim /var/named/iaskjob.com.zone $TTL 7200 iaskjob.com. IN SOA isakjob.com. iaskjob.163.com. (4012100 1H 15M 1W 1D) iaskjob.com. IN NS dns1.iaskjob.com. dns1.iaskjob.com. IN A 192.168.199.202 imooc.iaskjob.com. IN CNAME www.imooc.com. 5.重启named服务 service named restart 6.本机测试 dig @127.0.0.1 imooc.iaskjob.com 7.远程测试 物理机设置DNS为虚拟机的IP(192.168.199.202) 物理机运行nslookup imooc.iaskjob.com 能解析到imooc的IP地址就表示正确 补充:重启服务如有报错查看/var/log/messages tail -f /var/log/messages
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  • 实战场景2:CNAME
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  • Bind服务配置文件的重点总结: 1.严格注意语法书写,其格式非常严格 2.@是DNS记录中的保留字,表示当前域名(当书写邮箱地址的时候必须将@改成.代替) 3.记录不准折行书写 4.单行记录开头不准空格或tab开头
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  • 实战场景1:A记录
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课程须知
学习本门前,需要了解Linux的基本命令并对Linux网络有所了解。可以参看慕课网课程《Linux达人养成计划I》和《Linux网络管理》。
老师告诉你能学到什么?
1、了解Bind服务涉及的相关概念 2、能够进行Bind服务的安装和配置 3、了解Bind服务的应用场景 4、会进行DNS的正向解析和反向解析 5、掌握DNS正向解析客户端的相关命令

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