Configure the DNS service in Liunx and the DNS service in Liunx
When you Ping the host name, you can map the IP address of the host, and vice versa. Configure and specify the DNS server to quickly deploy the cluster. You do not need to modify the HOSTS file on each host to resolve the IP address and host name. In Linux, DNS
What is DNS
DNS (domain Name System, name Systems), a distributed database that maps to each other as domain names and IP addresses on the Internet, makes it easier for users to access the Internet without remembering the number of IP strings that can be read directly by the machine. The process by which the host name corresponds to the IP address is called Domain name resolution (or host name resolution).
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DNS is the abbreviation for the domain Name System and is a core service of the Internet as a distributed database that maps domain names and IP addresses to each other, making it easier for people to access the Internet without remembering the number of IP strings that can be read directly by the machine. This is also the official statement of DNS
Handling, Workaround:1. Check if an error is configured of DNS, If you have to remove it first;through vi/etc/sysconfig/network-scripts/ifcfg-em0 command to enter the NIC em0 the configuration file that will take DSN after the content is deleted, and then run the command to restart the network connection, Service Network Restart2. To change the value of the configuration item Usedns to No, the steps are:Execute command: Vim/etc/ssh/sshd_configthe fir
Use bind, dlz, and MySQL to build intelligent DNS. The DNS data can be put into MySQL.
Yum list all | grep BIND contains an SDB package. You can also put our data in the database.
How can I enable the DNS log function? It is not recommended to enable the log function. If the log function is enabled, the DNS performan
The previous section describes some of the main DNS suffixes of the computer, and today this section continues to extend this topic, as well as other concepts related to it.
The test environment in this section is a simple topology environment in which a DC is connected to a client computer. The following figure:
In the WINS series, we said that when a ping program is used to access a name, if a WINS server is set up, a resolution request is sent to
Every time we enter any domain name in the browser to access a website, we use the Dns protocol to perform a "Domain Name: IP" query. As a command line user, the Nslookup command is the most widely used dns-related command. As a programmer, taking c # as an example, the ip address of a domain name is probably the same as the line "System. net. dns. getHostByName
Document directory
DNS structure:
Header section:
Question:
Resource Structure:
Every time we enter any domain name in the browser to access a website, we use the DNS protocol to perform a "Domain Name: IP" query. As a command line user, the NSLookup command is the most widely used DNS-related command. As a programmer, taking C # as an example, the IP add
When
NetlogonWhen the service cannot register or cancel registering multiple resource records, the System Event Log will recordNetlogon5781Error message. The event description does not contain the names of these resource records. In addition, the event description may be "no ",DNS servers are available ", note: the common cause of these errors is that the domain controller references itself as the DNS
[Daily] DNS iterative Query Process and dns query Process
DNS is an application layer protocol, and the port numbers are tcp/53 and udp/53.DNS query process, such as accessing www.test.com1. The client queries www.test.com2. query the preferred DNS server, in Linux/etc/re
In the previous blog, we described how to create a common DNS record in a DNS server, and in this article we'll show you how to configure a secondary server for DNS, as well as a stub zone similar to a secondary zone.
A DNS secondary server is a fault-tolerant design, considering that once a
Today, the DNS system has already exceeded the originally set "Address Book" function. With the popularization of the Internet, more and more malicious intrusions and DDoS attacks have emerged. A modern DNS system should be designed to address these issues and provide end users with a fast and easy-to-use interface.The entry point for the DNS system is for the we
I don't know where you are. Anyway, I have a place called the ISP bandwidth service provider, Dr. Peng ... As the original credulous landlord said the legendary telecommunications plus the Great Wall Broadband dual service, the last to pull the landlord's net. As a result, I have never encountered my own IP address is telecommunications. Dr. Peng has always been the bar called the Great Wall broadband. I'm going to go oh ~ ~Always hijack my DNS, and,
information to the client. If the root DNS server does not have the resolution information for this domain nameThe IP address of the DNS server governing the. cn Resolution Service;4. The local DNS server requests the IP address of www.exmaple.com.cn from the DNS server under the jurisdiction of. CN;5. If the. cn serv
Each entry in a database is called a resource record (RR)
Resource record format:
The second field in the first section, the third field, the fourth field (resource record type), and the fifth field
Name TTL in (Internet) rrtvalue
If TTL is not written, you must specify a default value in the global variable. The TTL value can be omitted.
TTL 600;
For example:
Name [TTL] inrrt (resourcerecordtype) Value
Www.zledu.com. ina1.1.1.1
1.1.1.1inptrwww.zldu.com. (reverse resolution)
Resource Reco
First, the early topology map planning
DNS dual NIC; eth0:192.168.6.248 eth1:192.168.7.248
Telecom users: 192.168.6.X this network segment analog IP address 6.248 6.244
Unicom Users: 192.168.7.X This network segment analog IP address 7.248 7.244
Other users: any
Site Cluster Address:
Telecom Access: 192.168.1.1 192.168.1.2
Netcom Visit: 192.168.2.1 192.168.2.1
Other users: 192.168.3.1 192.168.3.1
Second, the configuration of rsync services,
The installation of DNS servers and clients is briefly described in the previous section. Although there are few knowledge points involved, there are already two parts of the DNS system that are indispensable, that is, DNS servers and clients, and the DNS system includes zone and resource records, which are primarily d
How does the DNS for Linux be set up? How to modify DNS addresses under LinuxHttps://jingyan.baidu.com/article/870c6fc32c028eb03fe4be30.htmlThe location of DNS settings under Linux is primarily,1 network card settings configuration file inside the DNS server address settings, 2. System default
First step, add the DNS configuration file
1. As shown in our Mac OS preferences, we found the "network" click into.
2. Now pop up the network window we can set up DNS, I here to cable as an example.
3. Then we click "Edit Position" to enter, as shown in the following figure.
4. In the pop-up dialog we click the "+" button, and then a new location of the network configuration file. I'll change it
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