dns server meaning

1 hours. We can increase the TTL value according to the actual need, for example, to cache the day set to 86400.Two. Decrease the TTL value to reduce the inaccessible time when changing space.DNS records are modified when the domain name space is changed, because the DNS record cache problem, the new domain name record may be in place in some places, but in some places may wait two days or even longer to take effect, only then some users will not be

DNS server: Describes DNS service principles, installation, master-slave configuration, and dns master-slave configuration. DNS server: Describes DNS service principles, installation, a

point to it, you will be finished. 2. Set up a server of your own, which must have a fixed IP address. We recommend that you host it in an IDC. The cheapest 1u license fee in Shanghai is about 3000 a year. The price of a 1u server starts from 10 thousand to, but it is a serial hard disk, Not A-to-SCSI. Before purchasing a server, you 'd better ask the supplier t

can enter the URL in the browser or the corresponding IP address, for example, we want to on the Sina network, we can enter the URL in the address bar of IE, can also enter the IP address, but this kind of IP address we can't remember or say is difficult to remember, So with the domain name, such a domain name will make it easy for us to remember. Therefore, DNS is equivalent to a yellow page, providing services for forwarding and fast query IP. Di

Pre-Erection Preparation:To set up a DNS server, you must install a software program that provides a DNS service, the BIND software, that can be installed using the following command:Yum install-y bind-chroot Bind-utis 1. Modify the master configuration file/etc/named.confThis server is relatively simple to set

"Experimental description"Experimental environment: Add a server ns2.test.com, IP 192.168.0.112;Experimental purpose: The new server is configured to 192.168.0.111 this primary DNS server from the DNS server;" conditions for imple

own hierarchical management system.Like the file system structure, the top-down tree hierarchyThe top is the root node domain name resolution server... Com. net. org. cn. TWTop-level domain name country domain nameIBM. | hp. TechBytesWWWFor example, if IBM has a host named WWW, its name will go from low to high.Www. IB,. com.Www.tech.ibm.com.Generally, it can be divided into 63 domain names, and each segment can contain up to 127 domain names.General

1. view the Host IP address resolved by the DNS host name Host CommandPurposeResolve a host name to an Internet address or an Internet address to a host name.SyntaxHost [-n [-a] [-c Class] [-d] [-r] [-t Type] [-v] [-w] [-z] Hostname | Address [Server]Hostnew [-a] [-c Class] [-d] [-r] [-t Type] [-v] [-w] [-z] Hostname | Address [Server]DescriptionThe/usr/bin/host

Install and configure the DNS server in linux, and configure the dns server in linux 1. DNS concept: Simply put, DNS is a service on the system that uses port 53 to provide mutual conversion between domain names and IP addresses

Tags: secondary work controller text master-slave DNS use clear LIS OpenRNDC Related knowledge:1. What is RNDC:Remote Name Domain controllerRNDC communicates with the name server via a TCP connection and sends a digitally signed command. In the current version of RNDC and named, the only supported authentication algorithm is HMAC-MD5, which uses shared keys on both ends of the connection. It provides the TS

And then, in the unfinished part of section nineth, we'll go on to explore the properties of the DNS server, the main content today is the Advanced tab, which is also an important part of the DNS attribute, but interestingly, we rarely modify the content here. However, the meaning of each option needs to be carefully u

Build a DNS server in Linux and a dns server in linuxSystem Environment: CentOS 6.5 miniIP Address: 192.168.100.1001. Install related software packages# Yum install-y bind * caching-nameserver2. Open firewall ports# Vi/etc/sysconfig/iptables-AINPUT-m state -- state NEW-m tcp-p tcp -- dport 53-j ACCEPT-AINPUT-m state --

Recently, my colleague reported that during the NSLookup test on the Intranet, I found that when I used the Intranet DNS server 192.168.1.1 for resolution, the DNS server responded very quickly and did not Any errors. However, when the DMZ server 51.144.198.99 is used for te

DNS domain Name service and build cache DNS server detailed (2)1.DNS Service Installation: BIND, full name is Berkeley Internet name Domain, this software is maintained by ISC/etc/named.conf: The main function is to define the working properties and areas of the bind process/etc/rndc.key: Full name Remote name Domain C

Before you build a DNS server, introduce the terminology in several DNS 1, forward lookup zone: mapping for Computer name to IP address. When a DNS client initiates a request to a DNS server to resolve the IP address of a compute

DNS Subdomain authorizationRole: Applies to the same DNS organizationThe resolution of the parent/child domain is handled by a different DNS serverThe parent DNS server should have the ability to iterate over the sub-domain nameSubordinate areabelong to different agency mana

DNS is the basic service of the internet, and bind is the most popular open-source DNS software. Because it is very popular, it is very aggressive. Therefore, we need to build a secure DNS server. There are several measures to build a secure DNS Service (for basic bind compi

compile and install #/Usr/local/named/sbin/rndc-confgen>/usr/local/named/etc/rndc. conf generate the key file of the rndc control command # Tail-10/usr/local/named/etc/rndc. conf | head-9 | sed s/# \ // g>/usr/local/named/etc/named. conf from rndc. extract named. key used by conf # Vi/usr/local/named/etc/named. conf edit named. conf Add the following content to named. conf: # Specify the resource file storage path and pid file name. Options { Directory "/usr/local/named/

Recently found that a number of installation Win8.1 system users encountered Win8.1 application store and Updata Automatic Updates, the presence of the application store can not open and can not get automatic update information and so on. And these two kinds of problems, we can usually modify the DNS server address to be resolved, so the following article will be a detailed introduction to the next Win8.1 h