whats dns server

Learning stems from the solution of problemsDuring the previous time, an Oracle software was installed on the virtual machine, the network connection of the virtual machine and the host machine was bridged mode, the static IP address and the gateway address were manually set, but the browser of the virtual machine could not be used.So through the ping test, the host ping www.baidu.com can ping, but the virtual machine said unknown host, so let the virtual machine ping the host ping the IP addres

One, understand the meaning of some nouns@----This symbol means that SOA is the same as a domainIn-----in is a domain name class that provides an IP address when used with a a,ptr or CNAME record, the domain name can be mapped to an IP address,Conversely, NS-----domain name or IP address of the zone DNS server specified by the domain name serverMX----MX records define what machine to send e-mail to a domain

Internet users with a certain technology base know what DNS is for, but most people are not sure how DNS looks for domain names. Ven found a picture that vividly describes the ripple effects of DNS lookups and may help people who do not know about DNS operations. The following image comes from VeriSign, in order to si

dsn.sn.cninfo.net218.30.19.40Fujian Telecom: 202.101.98.55 preferredFujian Mobile: 218.138.156.161 preferredPanyu, GuangzhouDNS server: 202.96.128.86, 202.96.128.166Jingzhou Telecom202.103.44.5202.103.24.68Fuzhou NetcomPreferred DNS address: 58.22.96.66Backup DNS address: 218.104.128.106Shanxi 202.99.192.68202.99.192.66Shenzhen: 202.96.134.20.202.96.128.68Xiangf

Many enterprises have set up a number of Web sites to meet the needs of employees, in order to save money, these sites usually use the virtual host technology, that is, on the same server to set up multiple sites, employees use level two domain names to access these sites. However, the workload of maintaining these level two domain names is very high, but we can solve this problem by using a generic domain name resolution technique, so that support fo

In the stock market increasingly hot, the whole people crazy stock market today, many units employees in the work period is not the first task, but the Internet to inquire stock information, online analysis of the stock market, as the unit boss certainly do not want their employees to work during the job unrelated things, Is there any way we can make the Internet connection of workstations in the local area network control in the boss's own hands? Someone might say, "It's not easy to do!" Just u

I. Introduction of QUERPERFWhen we configure the DNS server, we will certainly want to test the performance of the DNS server, after the online if the number of requests enough server can respond? Therefore, we can use the software simulation environment, the

DNS (Domain Name Service)Domain Name ServiceUsed for host name and IP conversion. Divided into forward parsing (FQDN--->ip) and reverse parsing (IP--->fqdn)UDP protocol, 53 portTCP protocol, 53 portDNS Server type:Primary DNS server: Server that maintains the resolved librar

Test environment: Windows Server 2008 Primary DNS Windows Server 2008 Secondary Zone DNS Create delegation Primary DNS Address: 192.168.19.100 Secondary DNS address: 192.168.19.101 Test Purpose: Build

hierarchy, and any one domain is at most one parent domain, but can have multiple or no subordinate domains. You cannot have the same subordinate domain or host name in the same domain, but you can have the same subordinate domain name or host name in different domains. 1. root domain: (root domain) root domains are only one, the root domain is the default, generally do not need to be expressed. The DNS namespace is managed by the InterNIC in the Un

Article Title: use BIND to create a DNS server on linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Although Linux has not made any notable progress in the world of desktop computing, It is very famous as a network server

Through this server, so that intranet users can access the Internet, here we use the FreeBSD with the bind to achieve DNS resolution, in fact, many DNS on the Internet use this software. The basic procedure is as follows:◇The DNS parent domain (edu.cn) gives me the following information:Domain-> wxicab.edu.cnDNS master

Although Microsoft has been occupying the operating system for many years, Linux has been gradually accepted by many computer users after 12 years. Here we will introduce you in detail how to configure the DNS server for Linux, it helps you learn how to configure a DNS server in Linux. //generatedbynamed-bootconf.

Summary This article describes how to configure a dynamic DNS server using IPtables. 1. Core Ideas The core idea of configuring a dynamic DNS server is to run multiple binds on the DNS server. Each BIND provides resolution for us

Many people may not know how Cisco IOS works. It does not matter. The following describes the router configuration and DNS server in Cicso IOS. Recently, a friend sent me an email asking him to know how to use Cicso IOS to block a specific website. He wrote: "I have a Cisco 2600 instance, which is usually used as an Internet server. Now I want to block some speci

Experimental OSCentOS 6.6 DNS master server ip:10.211.55.6CentOS 7.2 DNS from server ip:10.211.55.11 Core configuration files and directories/etc/named.conf/var/named/ /etc/named.conf configuration file explanation 650) this.width=650; "Src=" http://s3.51cto.com/wyfs02/M01/80/67/ Wkiom1daii3qwbwtaajdlquzvfu075.pn

Tags: add command Detailed restart detailed request view local serverConfiguration of the 1.DNS server 1.1 Domain Name resolution: The client initiates a domain name request and the DNS server resolves it. Protocol://host + domain name 1.2 ip-Domain Name analysis: (1.) by local when the Hosts file parsing vi/et

Linux DNS server views view and log system detailed DNS server ACLs: Define ACLs in the named.conf file as defined variables in bash for subsequent referenceACL format:ACL ACL name {IP Address 1 or subnet segment 1;IP Address 2 or subnet segment 2;};For example: Write the Intranet 172.17.0.0/16 and 192.168.1.0

This article was sponsored by Xiuyi linfeng and first launched in the dark world. To configure the DNS server in centos, you must first install the DNS software bind. Of course, we can also install other DNS software, such as the domestic open source DNS software dnspod. H